CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 25, Issue 8,2004, Pages 646, doi:10.3760/j.issn:0254-6450.2004.08.024
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 25, Issue 8,2004, Pages 670, doi:10.3760/j.issn:0254-6450.2004.08.027
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 25, Issue 8,2004, Pages 734, doi:10.3760/j.issn:0254-6450.2004.08.037
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 25, Issue 8,2004, Pages 658-660, doi:10.3760/j.issn:0254-6450.2004.08.005
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 25, Issue 8,2004, Pages 702-705, doi:10.3760/j.issn:0254-6450.2004.08.017