Chinese Journal of Epidemiology, Volume 34, Issue 9,2013, Pages 884-887, doi:10.3760/cma.j.issn.0254-6450.2013.09.006
Chinese Journal of Epidemiology, Volume 34, Issue 9,2013, Pages 931-934, doi:10.3760/cma.j.issn.0254-6450.2013.09.017
Chinese Journal of Epidemiology, Volume 34, Issue 9,2013, Pages 947-948, doi:10.3760/cma.j.issn.0254-6450.2013.09.023
Chinese Journal of Epidemiology, Volume 34, Issue 9,2013, Pages 900-905, doi:10.3760/cma.j.issn.0254-6450.2013.09.010
Chinese Journal of Epidemiology, Volume 34, Issue 9,2013, Pages 922-926, doi:10.3760/cma.j.issn.0254-6450.2013.09.015