Chinese Journal of Epidemiology, Volume 33, Issue 10,2012, Pages 1079-1082, doi:10.3760/cma.j.issn.0254-6450.2012.10.020
Chinese Journal of Epidemiology, Volume 33, Issue 10,2012, Pages 1086-1090, doi:10.3760/cma.j.issn.0254-6450.2012.10.022
Chinese Journal of Epidemiology, Volume 33, Issue 10,2012, Pages 1031-1035, doi:10.3760/cma.j.issn.0254-6450.2012.10.008
Chinese Journal of Epidemiology, Volume 33, Issue 10,2012, Pages 1026-1030, doi:10.3760/cma.j.issn.0254-6450.2012.10.007
Chinese Journal of Epidemiology, Volume 33, Issue 10,2012, Pages 997-1000, doi:10.3760/cma.j.issn.0254-6450.2012.10.001