CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 26, Issue 9,2005, Pages 707-710, doi:10.3760/j.issn:0254-6450.2005.09.021
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 26, Issue 9,2005, Pages 711-715, doi:10.3760/j.issn:0254-6450.2005.09.022
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 26, Issue 9,2005, Pages 684-686, doi:10.3760/j.issn:0254-6450.2005.09.015
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 26, Issue 9,2005, Pages 726-728, doi:10.3760/j.issn:0254-6450.2005.09.026
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 26, Issue 9,2005, Pages 673-675, doi:10.3760/j.issn:0254-6450.2005.09.012