CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 8,2003, Pages 714, doi:10.3760/j.issn:0254-6450.2003.08.031
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 8,2003, Pages 673, doi:10.3760/j.issn:0254-6450.2003.08.029
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 8,2003, Pages 689-693, doi:10.3760/j.issn:0254-6450.2003.08.012
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 8,2003, Pages 669, doi:10.3760/j.issn:0254-6450.2003.08.028
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 8,2003, Pages 708-710, doi:10.3760/j.issn:0254-6450.2003.08.017