CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 22, Issue 2,2001, Pages 158-159, doi:10.3760/j.issn:0254-6450.2001.02.038
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 22, Issue 2,2001, Pages 160, doi:10.3760/j.issn:0254-6450.2001.02.040
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 22, Issue 2,2001, Pages 153-154, doi:10.3760/j.issn:0254-6450.2001.02.024
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 22, Issue 2,2001, Pages 149-150, doi:10.3760/j.issn:0254-6450.2001.02.021
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 22, Issue 2,2001, Pages 102-104, doi:10.3760/j.issn:0254-6450.2001.02.007