Chinese Journal of Epidemiology, Volume 32, Issue 12,2011, Pages 1193-1198, doi:10.3760/cma.j.issn.0254-6450.2011.12.003
Chinese Journal of Epidemiology, Volume 32, Issue 12,2011, Pages 1181-1187, doi:10.3760/cma.j.issn.0254-6450.2011.12.001
Chinese Journal of Epidemiology, Volume 32, Issue 12,2011, Pages 1242-1246, doi:10.3760/cma.j.issn.0254-6450.2011.12.014
Chinese Journal of Epidemiology, Volume 32, Issue 12,2011, Pages 1269-1274, doi:10.3760/cma.j.issn.0254-6450.2011.12.020
Chinese Journal of Epidemiology, Volume 32, Issue 12,2011, Pages 1304-1305, doi:10.3760/cma.j.issn.0254-6450.2011.12.029