CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 4,2007, Pages 385-389, doi:10.3760/j.issn:0254-6450.2007.04.020
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 4,2007, Pages 313-314, doi:10.3760/j.issn:0254-6450.2007.04.001
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 4,2007, Pages 350-353, doi:10.3760/j.issn:0254-6450.2007.04.011
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 4,2007, Pages 331-333, doi:10.3760/j.issn:0254-6450.2007.04.006
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 4,2007, Pages 394-397, doi:10.3760/j.issn:0254-6450.2007.04.022