CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 22, Issue 1,2001, Pages 9-10, doi:10.3760/j.issn:0254-6450.2001.01.003
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 22, Issue 1,2001, Pages 49-50, doi:10.3760/j.issn:0254-6450.2001.01.016
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 22, Issue 1,2001, Pages 67, doi:10.3760/j.issn:0254-6450.2001.01.032
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 22, Issue 1,2001, Pages 58-60, doi:10.3760/j.issn:0254-6450.2001.01.019
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 22, Issue 1,2001, Pages 29, doi:10.3760/j.issn:0254-6450.2001.01.034