CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 32, Issue 5,2011, Pages 490-493, doi:10.3760/cma.j.issn.0254-6450.2011.05.016
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 32, Issue 5,2011, Pages 429-430, doi:10.3760/cma.j.issn.0254-6450.2011.05.001
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 32, Issue 5,2011, Pages 531-532, doi:10.3760/cma.j.issn.0254-6450.2011.05.028
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 32, Issue 5,2011, Pages 460-464, doi:10.3760/cma.j.issn.0254-6450.2011.05.009
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 32, Issue 5,2011, Pages 436-441, doi:10.3760/cma.j.issn.0254-6450.2011.05.003