Unearthed artifact, Head of Eleven-headed Guanyin

Shaanxi. Xi'an. Western suburb, Air Force Communication College; H: 10 3/64 in.; stone

Unearthed artifact, Head of Eleven-headed Guanyin, two views

Shaanxi. Xi'an. Western suburb, Air Force Communication College; H: 10 3/64 in.; stone

Unearthed artifact, Vajrapani

Shaanxi. Xian. Xigugan Street, Wangjiaxiang; H: 1 ft. 4 59/64 in.; stone

Unearthed artifact, Heavenly King

Shaanxi. Xian. Xigugan Street, Wangjiaxiang; H: 1 ft. 9 21/32 in.; stone

Unearthed artifact, Head of Guanyin

Shaanxi. Xi'an. South suburb, Shahutuo village; H: 1 ft. 2 11/64 in.; stone

Unearthed artifact, Head of a Figurine

Henan. Luoyang. West Lichun Road; H: 4 13/32 in.; painted pottery

Unearthed artifact, Figurines

Henan. Luoyang. Xin'an Power Plant; Hts: 3 11/32 in. to 3 ft. 1 13/32 in.; bronze

Tomb M338, excavated artifact, #1, Head, line drawings

Hunan. Yiyang

Tomb M43, excavated artifact, #1, Head, line drawings

Hunan. Yiyang

Tomb M2, excavated artifact, #28, Figurine

Hunan. Yiyang; wood

Unearthed artifact, Ge blade with tiger design

Sichuan. Chengdu. Baihuatan; L: 9 31/64 in.; bronze

Tomb of Prince Zhuang of Liang, excavated artifact, Tray with jue cups

Hubei. Zhongxiang; 2 3/4 in.x 5 33/64 in.; silver

Tomb, excavated artifact, Huan ring

Henan. Luoyang. Jianxi; Outer diameter: 3 13/16 in.; jade

Tomb, excavated artifact, Huan ring: detail

Henan. Luoyang. Jianxi; jade

Is the increase in coronary events on Mondays an artifact?

Background: The aim of this article was to investigate the size and possible causes of the reported excess in coronary events on Mondays. Methods: We conducted a metaanalysis of data from the World Health Organization (WHO) MONICA Project, which monitored trends and determinants in cardiovascular disease. The MONICA Project was undertaken in 21 countries from 1980 to 1995. Results: We found a small overall excess rate of coronary events on Mondays. In a population experiencing 100 events per week, we estimate there would be approximately I more event on Monday than on any other day. Hierarchical logistic regression showed that the Monday excess was greater in centers with less thorough data collection procedures. Conclusions: The excess of coronary events on Mondays is probably an artifact resulting from events with uncertain dates being coded as taking place on Mondays.