CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 2,2003, Pages 163-163, doi:10.3760/j.issn:0254-6450.2003.02.036
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 2,2003, Pages 165-165, doi:10.3760/j.issn:0254-6450.2003.02.038
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 2,2003, Pages 135-139, doi:10.3760/j.issn:0254-6450.2003.02.015
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 2,2003, Pages 161-162, doi:10.3760/j.issn:0254-6450.2003.02.034
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 2,2003, Pages 83-85, doi:10.3760/j.issn:0254-6450.2003.02.001