CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 21, Issue 3,2000, Pages 封三, doi:10.3760/j.issn:0254-6450.2000.03.037
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 21, Issue 3,2000, Pages 231-233, doi:10.3760/j.issn:0254-6450.2000.03.019
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 21, Issue 3,2000, Pages 167-170, doi:10.3760/j.issn:0254-6450.2000.03.002
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 21, Issue 3,2000, Pages 177-180, doi:10.3760/j.issn:0254-6450.2000.03.004
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 21, Issue 3,2000, Pages 212-215, doi:10.3760/j.issn:0254-6450.2000.03.013