Chinese Journal of Epidemiology, Volume 34, Issue 5,2013, Pages 428-432, doi:10.3760/cma.j.issn.0254-6450.2013.05.004
Chinese Journal of Epidemiology, Volume 34, Issue 5,2013, Pages 464-470, doi:10.3760/cma.j.issn.0254-6450.2013.05.012
Chinese Journal of Epidemiology, Volume 34, Issue 5,2013, Pages 531-535, doi:10.3760/cma.j.issn.0254-6450.2013.05.026
Chinese Journal of Epidemiology, Volume 34, Issue 5,2013, Pages 520-522, doi:10.3760/cma.j.issn.0254-6450.2013.05.023
Chinese Journal of Epidemiology, Volume 34, Issue 5,2013, Pages 496-502, doi:10.3760/cma.j.issn.0254-6450.2013.05.019