CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 6,2003, Pages 462-464, doi:10.3760/j.issn:0254-6450.2003.06.011
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 6,2003, Pages 491-493, doi:10.3760/j.issn:0254-6450.2003.06.018
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 6,2003, Pages 432-433, doi:10.3760/j.issn:0254-6450.2003.06.002
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 6,2003, Pages 443-446, doi:10.3760/j.issn:0254-6450.2003.06.006
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 6,2003, Pages 522, doi:10.3760/j.issn:0254-6450.2003.06.033