CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 25, Issue 2,2004, Pages 124-126, doi:10.3760/j.issn:0254-6450.2004.02.009
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 25, Issue 2,2004, Pages 134-137, doi:10.3760/j.issn:0254-6450.2004.02.012
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 25, Issue 2,2004, Pages 97-102, doi:10.3760/j.issn:0254-6450.2004.02.003
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 25, Issue 2,2004, Pages 131-133, doi:10.3760/j.issn:0254-6450.2004.02.011
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 25, Issue 2,2004, Pages 154-157, doi:10.3760/j.issn:0254-6450.2004.02.017