835 resultados para COHORT

Cohort study of risk of fracture before and after surgery for primary hyperparathyroidism

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Risk of testicular cancer in men with abnormal semen characteristics: cohort study

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Risk of venous thromboembolism among users of third generation oral contraceptives compared with users of oral contraceptives with levonorgestrel before and after 1995: cohort and case-control analysis

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Final results from 10 year cohort of patients undergoing surveillance for Barrett's oesophagus: observational study

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Using fetal nuchal translucency to screen for major congenital cardiac defects at 10-14 weeks of gestation: population based cohort study

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Clinical predictors of hypoxaemia in Gambian children with acute lower respiratory tract infection: prospective cohort study

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Mortality associated with oral contraceptive use: 25 year follow up of cohort of 46 000 women from Royal College of General Practitioners’ oral contraception study

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Association between maternal anxiety in pregnancy and increased uterine artery resistance index: cohort based study

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Is there a rationale for rationing chronic dialysis? A hospital based cohort study of factors affecting survival and morbidity

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Historical cohort study of in utero exposure to uterotonic drugs and cognitive function in young adult life

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