CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 9,2007, Pages 848-850, doi:10.3760/j.issn:0254-6450.2007.09.005
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 9,2007, Pages 895-897, doi:10.3760/j.issn:0254-6450.2007.09.016
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 9,2007, Pages 932-933, doi:10.3760/j.issn:0254-6450.2007.09.033
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 9,2007, Pages 918-921, doi:10.3760/j.issn:0254-6450.2007.09.022
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 9,2007, Pages 891-894, doi:10.3760/j.issn:0254-6450.2007.09.015