1000 resultados para chromatographie en phase gazeuse


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OBJECTIVE: To evaluate the antitumor activity and safety profile of plitidepsin administered as a 1h weekly intravenous (i.v.) infusion of 3.2mg/m(2) to patients with small cell lung cancer (SCLC) who relapsed or progressed after one line of chemotherapy. PATIENTS AND METHODS: This was a multicenter, open-label, single-arm, exploratory, phase II clinical trial. Treatment lasted until disease progression, unacceptable toxicity, patient refusal or treatment delay for >2 weeks. Objective response rate (primary efficacy endpoint) was evaluated according to response evaluation criteria in solid tumors (RECIST). The rate of stable disease (SD) lasting for at least 6 months and time-to-event variables were secondary endpoints of efficacy. Toxicity was assessed using National Cancer Institute Common Toxicity Criteria (NCI-CTC) version 2.0. RESULTS: Twenty pretreated SCLC patients (median age, 60 years) with extensive (n=13) or limited-stage disease (n=7) received a total of 24 treatment cycles (median, one cycle per patient; range, 1-2). Objective tumor responses were not observed and only one of the 17 evaluable patients had SD. With a median follow-up of 11.8 months, the progression-free survival and the median overall survival were 1.3 months and 4.8 months, respectively. The most troubling or common toxicities were fatigue, muscle weakness, lymphopenia, anemia (no patients showed neutropenia), and asymptomatic, non-cumulative increase of transaminases levels and alkaline phosphatase. CONCLUSION: This clinical trial shows that a cycle of 1h weekly i.v. infusion of plitidepsin (3.2mg/m(2)) was generally well tolerated other than fatigue and muscle weakness in patients with pretreated SCLC. One patient died due to multi-organ failure. The absence of antitumor activity found here precludes further studies of this plitidepsin schedule as second-line single-agent treatment of SCLC.

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A Phase 1 double-blind placebo-controlled study was performed to evaluate a vaccine against American tegumentary leishmaniasis in 61 healthy male volunteers. Side effects and the immune response to the vaccine were evaluated, with 1- and 2- dose schemes, with intervals of 7 or 21 days, each dose containing 1440 mg of protein N antigen of a single strain of Leishmania amazonensis (PH 8) diluted in merthiolated saline (1:10,000). Merthiolated saline and an inert substance were used as placebos. No significant clinical alterations were found following the respective injections in the vaccinated individuals as compared to the placebos, except for local pain, which was associated significantly with injection of the vaccine. The laboratory alterations we observed bore no association with the clinical findings and were unimportant. We observed no differences between the groups with regard to seroconversion or the Montenegro skin test. However, the group that received a single dose of the vaccine and the one that received two doses with a 21-day interval displayed cutaneous induration significantly larger than in the control group, with 100%, 100%, and 66% conversion in the skin test, respectively. We concluded that the vaccine does not present any major side effect that would contraindicate its use in healthy individuals.

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INTRODUCTION: The phase III EORTC 22033-26033/NCIC CE5 intergroup trial compares 50.4 Gy radiotherapy with up-front temozolomide in previously untreated low-grade glioma. We describe the digital EORTC individual case review (ICR) performed to evaluate protocol radiotherapy (RT) compliance. METHODS: Fifty-eight institutions were asked to submit 1-2 randomly selected cases. Digital ICR datasets were uploaded to the EORTC server and accessed by three central reviewers. Twenty-seven parameters were analysed including volume delineation, treatment planning, organ at risk (OAR) dosimetry and verification. Consensus reviews were collated and summary statistics calculated. RESULTS: Fifty-seven of seventy-two requested datasets from forty-eight institutions were technically usable. 31/57 received a major deviation for at least one section. Relocation accuracy was according to protocol in 45. Just over 30% had acceptable target volumes. OAR contours were missing in an average of 25% of cases. Up to one-third of those present were incorrectly drawn while dosimetry was largely protocol compliant. Beam energy was acceptable in 97% and 48 patients had per protocol beam arrangements. CONCLUSIONS: Digital RT plan submission and review within the EORTC 22033-26033 ICR provide a solid foundation for future quality assurance procedures. Strict evaluation resulted in overall grades of minor and major deviation for 37% and 32%, respectively.

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In this paper a model is developed to describe the three dimensional contact melting process of a cuboid on a heated surface. The mathematical description involves two heat equations (one in the solid and one in the melt), the Navier-Stokes equations for the flow in the melt, a Stefan condition at the phase change interface and a force balance between the weight of the solid and the countering pressure in the melt. In the solid an optimised heat balance integral method is used to approximate the temperature. In the liquid the small aspect ratio allows the Navier-Stokes and heat equations to be simplified considerably so that the liquid pressure may be determined using an igenfunction expansion and finally the problem is reduced to solving three first order ordinary differential equations. Results are presented showing the evolution of the melting process. Further reductions to the system are made to provide simple guidelines concerning the process. Comparison of the solutions with experimental data on the melting of n-octadecane shows excellent agreement.

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BACKGROUND: Oral temozolomide has shown similar efficacy to dacarbazine in phase III trials with median progression-free survival (PFS) of 2.1 months. Bevacizumab has an inhibitory effect on the proliferation of melanoma and sprouting endothelial cells. We evaluated the addition of bevacizumab to temozolomide to improve efficacy in stage IV melanoma. PATIENTS AND METHODS: Previously untreated metastatic melanoma patients with Eastern Cooperative Oncology Group performance status of two or more were treated with temozolomide 150 mg/m(2) days 1-7 orally and bevacizumab 10 mg/kg body weight i.v. day 1 every 2 weeks until disease progression or unacceptable toxicity. The primary end point was disease stabilisation rate [complete response (CR), partial response (PR) or stable disease (SD)] at week 12 (DSR12); secondary end points were best overall response, PFS, overall survival (OS) and adverse events. RESULTS: Sixty-two patients (median age 59 years) enrolled at nine Swiss centres. DSR12 was 52% (PR: 10 patients and SD: 22 patients). Confirmed overall response rate was 16.1% (CR: 1 patient and PR: 9 patients). Median PFS and OS were 4.2 and 9.6 months. OS (12.0 versus 9.2 months; P = 0.014) was higher in BRAF V600E wild-type patients. CONCLUSIONS: The primary end point was surpassed showing promising activity of this bevacizumab/temozolomide combination with a favourable toxicity profile. Response and OS were significantly higher in BRAF wild-type patients.

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Purpose/Objective(s): RTwith TMZ is the standard for GBM. dd TMZ causes prolongedMGMTdepletion in mononuclear cells and possibly in tumor. The RTOG 0525 trial (ASCO 2011) did not show an advantage from dd TMZ for survival or progression free survival. We conducted exploratory, hypothesis-generating subset analyses to detect possible benefit from dd TMZ.Materials/Methods: Patients were randomized to std (150-200 mg/m2 x 5 d) or dd TMZ (75-100 mg/m2 x 21 d) q 4 weeks for 6- 12 cycles. Eligibility included age.18, KPS$ 60, and. 1 cm2 tissue for prospective MGMTanalysis for stratification. Furtheranalyses were performed for all randomized patients (''intent-to-treat'', ITT), and for all patients starting protocol therapy (SPT). Subset analyses were performed by RPA class (III, IV, V), KPS (90-100, = 50,\50), resection (partial, total), gender (female, male), and neurologic dysfunction (nf = none, minor, moderate).Results: No significant difference was seen for median OS (16.6 vs. 14.9 months), or PFS (5.5 vs. 6.7 months, p = 0.06). MGMT methylation was linked to improved OS (21.2 vs. 14 months, p\0.0001), and PFS (8.7 vs. 5.7 months, p\0.0001). For the ITT (n = 833), there was no OS benefit from dd TMZ in any subset. Two subsets showed a PFS benefit for dd TMZ: RPA class III (6.2 vs. 12.6 months, HR 0.69, p = 0.03) and nf = minor (HR 0.77, p = 0.01). For RPA III, dd dramatically delayed progression, but post-progression dd patients died more quickly than std. A similar pattern for nf = minor was observed. For the SPT group (n = 714) there was neither PFS nor OS benefit for dd TMZ, overall. For RPA class III and nf = minor, there was a PFS benefit for dd TMZ (HR 0.73, p = 0.08; HR 0.77, p = 0.02). For nf = moderate subset, both ITT and SPT, the std arm showed superior OS (14.4 vs. 10.9 months) compared to dd, without improved PFS (HR 1.46, p = 0.03; and HR 1.74, p = 0.01. In terms of methylation status within this subset, there were more methylated patients in the std arm of the ITT subset (n = 159; 32 vs. 24%). For the SPT subset (n = 124), methylation status was similar between arms.Conclusions: This study did not demonstrate improved OS for dd TMZ for any subgroup, but for 2 highly functional subgroups, PFS was significantly increased. These data generate the testable hypothesis that intensive treatment may selectively improve disease control in those most likely able to tolerate dd therapy. Interpretation of this should be considered carefully due to small sample size, the process of multiple observations, and other confounders.Acknowledgment: This project was supported by RTOG grant U10 CA21661, and CCOP grant U10 CA37422 from the National Cancer Institute (NCI).

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Introduction : la Sclérose en plaques (SEP) est le prototype de désordre auto-immun du système nerveux central. Avec environ 110 malades par 100'000 habitants, la Suisse est considérée un pays à haute prévalence. Chez environ 80% des patients, la maladie débute par la forme récurrente- rémittente (RR), où des poussées aiguës s'intercalent avec des périodes de rémission. Cette phase se conclut dans son évolution naturelle généralement en une phase secondairement progressive, pendant laquelle le déficit progresse en l'absence de poussée. Sur le plan physiopathologique, deux phénomènes interagissent : l'atteinte inflammatoire démyélinisante et l'atteinte neurodégénerative. La première est { l'origine des poussées aiguës, la deuxième se manifeste cliniquement par la progression irréversible du déficit neurologique. En Suisse les immunomodulateurs ont été utilisés comme thérapies de fond pour la SEP à partir des années 1995. Leur effet sur le taux de poussées a été largement démontré, tandis que leur efficacité sur l'évolution de la maladie à long terme reste ouverte. Le moyen le plus répandu pour quantifier le niveau du handicap neurologique est la Kurtzke Expanded Disability Status Scale (EDSS). Cette échelle évalue les troubles neurologiques en les classifiant de 0 (examen normal) à 10 (décès) avec des marches de demi-points. Notre recherche à voulu identifier des facteurs cliniques précoces { valeur prédictif sur l'évolution du déficit neurologique permanent, ainsi qu'analyser le moment d'introduction du traitement pour extraire des informations utiles { la décision thérapeutique. Méthodes : Exploitation de la base de données iMed-CHUV comptant 1150 patients SEP (dont 622 SEP RR) pour analyser rétrospectivement, dans la SEP RR, l'influence de différentes variables cliniques précoces (taux de poussées pendant les premières deux années de maladie, intervalle entre les deux premières poussées, sévérité et site anatomique de la première poussée, déficit résiduel après la première poussée) et de deux caractéristiques liées { l'instauration du traitement immunosuppresseur de fond (âge et délai d'introduction) sur l'évolution du déficit neurologique vers un score EDSS ≥4.0. Les variables ont été testées avec la méthode d'estimation de taux de survie Kaplan-Meier. Résultats: 349 patients avec SEP RR possédaient les critères nécessaires pour faire partie de l'analyse, le suivi moyen étant de 8.26 ans (SD 4.77). Un taux de poussées élevé pendant les premiers 2 ans (>1 vs ≤1) et un long intervalle entre les 2 premiers épisodes (>36 vs >12-36 vs ≤12) étaient significativement associés au risque de progression du déficit neurologique vers un score EDSS de 4.0 ou plus (log Rank P=0.016 et P=0.008 respectivement). Par contre ni le site anatomique de la première poussée ni l'âge d'introduction du traitement immunomodulateur n'avaient d'influence significative sur la progression du déficit neurologique (log rank P=0.370 et P=0.945 respectivement). Etonnamment une introduction rapide du traitement était associée à une plus forte progression du déficit neurologique (log rank P=0.032), montrant qu'une partie des patients a une évolution bénigne même en l'absence de traitement. Conclusions : L'activité inflammatoire précoce, dont le niveau peut être estimé par indices précoces comme le taux de poussées et l'intervalle entre les deux premières poussées, mais non le site de primo-manifestation prédit la progression ultérieure du déficit neurologique. Ces indices doivent être utilisés en combinaison avec les informations fournies par l'IRM pour l'individuation et le traitement précoce des patients à risque, indépendamment de leur âge. En raison des effets indésirables et des coûts élevés, les thérapies doivent cibler de façon spécifique les classes à risque, et épargner les patients avec évolution lente.

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Abstract Background. The broad spectrum of antitumor activity of both the oral platinum analogue satraplatin (S) and capecitabine (C), along with the advantage of their oral administration, prompted a clinical study aimed to define the maximum tolerated dose (MTD) of the combination. Patients and methods. Four dose levels of S (mg/m(2)/day) and C (mg/m(2)/day) were evaluated in adult patients with advanced solid tumors: 60/1650, 80/1650, 60/2000, 70/2000; a course consisted of 28 days with sequential administration of S (days 1-5) and C (days 8-21) followed by one week rest. Results. Thirty-seven patients were treated, 24 in the dose escalation and 13 in the expansion phase; at the MTD, defined at S 70/C 2000, two patients presented dose limiting toxicities: lack of recovery of neutropenia by day 42 and nausea with dose skip of C. Most frequent toxicities were nausea (57%), diarrhea (51%), neutropenia (46%), anorexia, fatigue, vomiting (38% each). Two partial responses were observed in platinum sensitive ovarian cancer and one in prostate cancer. Conclusion. At S 70/C 2000 the combination of sequential S and C is tolerated with manageable toxicities; its evaluation in platinum and fluorouracil sensitive tumor types is worthwhile because of the easier administration and lack of nephro- and neurotoxicity as compared to parent compounds.

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Aggregating fetal liver cell cultures were tested for their ability to metabolize xenobiotics using ethoxycoumarin-O-deethylase (ECOD), as marker of phase I metabolism, and glutathione S-transferase (GST), as marker for phase II reactions. Significant basal activities, stable over 14 days in culture were measured for both ECOD and GST activities. The prototype cytochrome P450 inducers, 3-methylcholanthrene (3-MC) and phenobarbital (PB), increased ECOD and GST activities reaching an optimum 7 days after culturing, followed by a decline in activity. This decline was partially prevented by 1% dimethyl sulfoxide (DMSO) added chronically to the culture medium. DMSO was also found to induce ECOD activity and to a lesser extent GST activity. Furthermore, it potentiated in a dose-dependent manner the induction of ECOD by PB. The food-borne carcinogen 2-amino-3,8-dimethylimidazo[4,5-f]quinoxaline (MeIQx) is metabolically transformed through a number of pathways in vivo. It was therefore used to examine the metabolic capacity in fetal and adult liver cell aggregates. Metabolism of MeIQx was mainly through N2-conjugation, resulting in formation of the N2-glucuronide and sulfamate conjugates for non-induced fetal liver cells. These metabolites were also found in large amounts in non-induced adult liver cells. Low levels of cytochrome P450-mediated ring-hydroxylated metabolites were detected in both non-induced fetal and adult liver cells. After induction with arochlor (PCB) or 3-MC, the major pathway was ring-hydroxylation (cytochrome P450 dependent), followed by conjugation to beta-glucuronic or sulfuric acid. The presence of the glucuronide conjugate of N-hydroxy-MeIQx, a mutagenic metabolite, suggested an induction of P450 CYP1A2. The metabolism of MeIQx by liver cell aggregates is very similar to that observed in vivo and suggests that aggregating liver cell cultures are a useful model for in vitro metabolic studies in toxicology.

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This project is a study of the men's movement in Switzerland, especially regarding organizations seeking to redefine male identity. So far, this topic has been understudied, in Switzerland. The few studies available on the subject mostly adopt a (pro)feminist perspective. Their main purpose is to criticize men's movement participants. What is more, scarce researches on this problem mostly conducted by members of the Swiss men's movement themselves are mainly descriptive and methodologically problematic. In this context, I initiated the first national and sociological study of the men's movement in Switzerland. My main goals are: firstly, to propose a typology of organizations forming the men's movement in Switzerland. Secondly, I develop a sociological analysis of this phenomenon, taking into account in this process especially the characteristics of the Swiss context. Consequently, I adopted a mixed method approach, which included two main research steps: Firstly, I defined a representative sample of men's movement organizations in Switzerland. Based on a content analysis of men's organizations' websites, I was able to distinguish three ideal-types: Radical Criticism of Masculinity, Criticism of Hegemonic Masculinity, Defense of Men and Traditional Masculinity. Based on these three concepts, I subsequently analyzed the discourse on masculinity amongst men's movement organizations. Secondly, I conducted a survey of men's movement participants. This survey was based on the results of the content analysis. In this particular stage, I mainly used factor analysis. My results show that it would be all too simplistic to characterize the men's movement, in Switzerland, as a criticism of women's emancipation. On the contrary, my analysis reveals a more complex picture: The two main factors, which influence the men's movement, in Switzerland, are the contemporary sociological context and the Swiss society's particular features. I find that male roles, on the one hand, depend very much on today's cultural shift from materialistic to self-expression values. On the other hand, male role models reflect a social adaptation process. Moreover, as a reaction to deep changes in contemporary family structures, I observe an individualization process, characterized by separation between parental and conjugal functions that greatly shapes male role models. - Cette thèse analyse le phénomène des hommes en mouvement, dans le contexte de la Suisse. Cet ensemble est formé d'organisations regroupant des hommes impliqués consciemment dans un processus d'actions et de réflexions sur l'identité masculine. La revue de la littérature révèle qu'en Suisse, le sujet des hommes en mouvement est très peu étudié. Jusqu'ici, les rares recherches s'y intéressant adoptent généralement une approche (pro)féministe, dont l'objectif est de dénoncer ce phénomène. En outre, de rares recherches, issues des acteurs mêmes de ce mouvement, proposent une vue descriptive de l'ensemble, mais souffrant de faiblesses méthodologiques. Par notre recherche, nous souhaitons contribuer à l'étude de ce sujet, en initiant la première étude d'envergure nationale portant sur les hommes en mouvement. L'objectif final est de déboucher sur une typologie des organisations réunissant les hommes en mouvement, puis sur une analyse de la spécificité de cet ensemble, dans le contexte suisse. Pour remplir ces objectifs, nous avons mis en place un dispositif de méthodes mixtes, en deux phases. Lors d'une première étape, nous avons sélectionné un échantillon représentatif de la diversité des organisations masculines. Par une analyse de contenu effectuée sur la documentation récoltée sur les sites Internet de ces dernières, nous avons pu, en utilisant une démarche inductive et qualitative, faire émerger trois idéaux-types : Critique radicale de la masculinité, Critique de la masculinité hégémonique, Défense des hommes et de la masculinité traditionnelle. Ces concepts permettent de rendre compte, de manière schématique, des trois types de discours contemporains sur l'identité masculine diffusés par les hommes en mouvement. Lors d'une seconde étape, nous avons réalisé une enquête auprès des membres des organisations masculines. Pour y parvenir, nous avons créé un questionnaire incluant des propositions élaborées à partir des résultats de l'étape précédente. Lors de cette phase, nous avons réalisé une analyse factorielle. Les résultats montrent que le phénomène du mouvement des hommes ne saurait se réduire, en Suisse, à un mouvement de ressac visant à attaquer les droits des femmes. Au contraire, il s'agit d'un phénomène complexe, fortement dépendant du contexte sociologique contemporain et des caractéristiques de la société helvétique. Nous affirmons, entre autres, que les modèles masculins observables dans cet ensemble sont façonnés, d'une part, par une transition culturelle, caractérisée par le passage des valeurs matérialistes aux valeurs d'expression de soi. D'autre part, les modèles masculins prônés par les hommes en mouvement reflètent un processus d'adaptation sociale. En effet, en réaction au contexte de reconfiguration des formes familiales, on assiste à une individualisation des rapports de filiation et au détachement de la fonction parentale et conjugale, qui imprègnent fortement les modèles masculins défendus par ces hommes.

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PURPOSE: This randomized phase II trial evaluated two docetaxel-based regimens to see which would be most promising according to overall response rate (ORR) for comparison in a phase III trial with epirubicin-cisplatin-fluorouracil (ECF) as first-line advanced gastric cancer therapy. PATIENTS AND METHODS: Chemotherapy-naïve patients with measurable unresectable and/or metastatic gastric carcinoma, a performance status <or= 1, and adequate hematologic, hepatic, and renal function randomly received <or= eight 3-weekly cycles of ECF (epirubicin 50 mg/m(2) on day 1, cisplatin 60 mg/m(2) on day 1, and fluorouracil [FU] 200 mg/m(2)/d on days 1 to 21), TC (docetaxel initially 85 mg/m(2) on day 1 [later reduced to 75 mg/m(2) as a result of toxicity] and cisplatin 75 mg/m(2) on day 1), or TCF (TC plus FU 300 mg/m(2)/d on days 1 to 14). Study objectives included response (primary), survival, toxicity, and quality of life (QOL). RESULTS: ORR was 25.0% (95% CI, 13% to 41%) for ECF, 18.5% (95% CI, 9% to 34%) for TC, and 36.6% (95% CI, 23% to 53%) for TCF (n = 119). Median overall survival times were 8.3, 11.0, and 10.4 months for ECF, TC, and TCF, respectively. Toxicity was acceptable, with one toxic death (TC arm). Grade 3 or 4 neutropenia occurred in more treatment cycles with docetaxel (TC, 49%; TCF, 57%; ECF, 34%). Global health status/QOL substantially improved with ECF and remained similar to baseline with both docetaxel regimens. CONCLUSION: Time to response and ORR favor TCF over TC for further evaluation, particularly in the neoadjuvant setting. A trend towards increased myelosuppression and infectious complications with TCF versus TC or ECF was observed.

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BACKGROUND: Hypertension can be controlled adequately with existing drugs such as angiotensin-converting enzyme inhibitors or angiotensin II receptor blockers. Nevertheless, treatment success is often restricted by patients not adhering to treatment. Immunisation against angiotensin II could solve this problem. We investigated the safety and efficacy of CYT006-AngQb-a vaccine based on a virus-like particle-that targets angiotensin II to reduce ambulatory blood pressure. METHODS: In this multicentre, double-blind, randomised, placebo-controlled phase IIa trial, 72 patients with mild-to-moderate hypertension were randomly assigned with a computer-generated randomisation list to receive subcutaneous injections of either 100 mug CYT006-AngQb (n=24), 300 mug CYT006-AngQb (24), or placebo (24), at weeks 0, 4, and 12. 24-h ambulatory blood pressure was measured before treatment and at week 14. The primary outcomes were safety and tolerability. Analyses were done by intention to treat. This study is registered with ClinicalTrials.gov, number NCT00500786. FINDINGS: Two patients in the 100 mug group, three in the 300 mug group, and none in the placebo group discontinued study treatment. All patients were included in safety analyses; efficacy analyses did not include the five dropouts, for whom no data were available at week 14. Five serious adverse events were reported (two in the 100 mug group, two in the 300 mug group, and one in the placebo group); none were deemed to be treatment related. Most side-effects were mild, transient reactions at the injection site. Mild, transient influenza-like symptoms were seen in three patients in the 100 mug group, seven in the 300 mug group, and none in the placebo group. In the 300 mug group, there was a reduction from baseline in mean ambulatory daytime blood pressure at week 14 by -9.0/-4.0 mm Hg compared with placebo (p=0.015 for systolic and 0.064 for diastolic). The 300 mug dose reduced the early morning blood-pressure surge compared with placebo (change at 0800 h -25/-13 mm Hg; p<0.0001 for systolic, p=0.0035 for diastolic). INTERPRETATION: Immunisation with CYT006-AngQb was associated with no serious adverse events; most observed adverse events were consistent with local or systemic responses similar to those seen with other vaccines. The 300 mug dose reduced blood pressure in patients with mild-to-moderate hypertension during the daytime, especially in the early morning. FUNDING: Cytos Biotechnology AG.

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The IPH response to the New Strategic Direction for Alcohol and Drugs questionnaire which has been designed to help stakeholders respond to New Strategic Direction for Alcohol and Drugs Phase 2 (2011-2016) consultation document.