Chinese Journal of Epidemiology, Volume 36, Issue 2,2015, Pages 139-143, doi:10.3760/cma.j.issn.0254-6450.2015.02.009
Chinese Journal of Epidemiology, Volume 36, Issue 2,2015, Pages 181-185, doi:10.3760/cma.j.issn.0254-6450.2015.02.018
Chinese Journal of Epidemiology, Volume 36, Issue 2,2015, Pages 136-138, doi:10.3760/cma.j.issn.0254-6450.2015.02.008
Chinese Journal of Epidemiology, Volume 36, Issue 2,2015, Pages 186-188, doi:10.3760/cma.j.issn.0254-6450.2015.02.019
Chinese Journal of Epidemiology, Volume 36, Issue 2,2015, Pages 172-175, doi:10.3760/cma.j.issn.0254-6450.2015.02.016