CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 2,2007, Pages 160-164, doi:10.3760/j.issn:0254-6450.2007.02.014
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 2,2007, Pages 123-126, doi:10.3760/j.issn:0254-6450.2007.02.005
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 2,2007, Pages 136-140, doi:10.3760/j.issn:0254-6450.2007.02.008
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 2,2007, Pages 189-191, doi:10.3760/j.issn:0254-6450.2007.02.021
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 2,2007, Pages 204-205, doi:10.3760/j.issn:0254-6450.2007.02.031