CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 8,2007, Pages 741, doi:10.3760/j.issn:0254-6450.2007.08.038
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 8,2007, Pages 810-813, doi:10.3760/j.issn:0254-6450.2007.08.021
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 8,2007, Pages 818-820, doi:10.3760/j.issn:0254-6450.2007.08.023
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 8,2007, Pages 749-752, doi:10.3760/j.issn:0254-6450.2007.08.006
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 8,2007, Pages 761-764, doi:10.3760/j.issn:0254-6450.2007.08.009