Chinese Journal of Epidemiology, Volume 35, Issue 3,2014, Pages 299-302, doi:10.3760/cma.j.issn.0254-6450.2014.03.018
Chinese Journal of Epidemiology, Volume 35, Issue 3,2014, Pages 255-258, doi:10.3760/cma.j.issn.0254-6450.2014.03.008
Chinese Journal of Epidemiology, Volume 35, Issue 3,2014, Pages 259-261, doi:10.3760/cma.j.issn.0254-6450.2014.03.009
Chinese Journal of Epidemiology, Volume 35, Issue 3,2014, Pages 250-254, doi:10.3760/cma.j.issn.0254-6450.2014.03.007
Chinese Journal of Epidemiology, Volume 35, Issue 3,2014, Pages 266-270, doi:10.3760/cma.j.issn.0254-6450.2014.03.011