Chinese Journal of Epidemiology, Volume 34, Issue 1,2013, Pages 53-56, doi:10.3760/cma.j.issn.0254-6450.2013.01.013
Chinese Journal of Epidemiology, Volume 34, Issue 1,2013, Pages 85-90, doi:10.3760/cma.j.issn.0254-6450.2013.01.020
Chinese Journal of Epidemiology, Volume 34, Issue 1,2013, Pages 75-79, doi:10.3760/cma.j.issn.0254-6450.2013.01.018
Chinese Journal of Epidemiology, Volume 34, Issue 1,2013, Pages 19-23, doi:10.3760/cma.j.issn.0254-6450.2013.01.005
Chinese Journal of Epidemiology, Volume 34, Issue 1,2013, Pages 71-74, doi:10.3760/cma.j.issn.0254-6450.2013.01.017