Chinese Journal of Epidemiology, , Issue 5,2014, Pages 475-476, doi:10.3760/cma.j.issn.0254-6450.2014.05.001
Chinese Journal of Epidemiology, , Issue 5,2014, Pages 547-551, doi:10.3760/cma.j.issn.0254-6450.2014.05.017
Chinese Journal of Epidemiology, , Issue 5,2014, Pages 494-499, doi:10.3760/cma.j.issn.0254-6450.2014.05.006
Chinese Journal of Epidemiology, , Issue 5,2014, Pages 479-483, doi:10.3760/cma.j.issn.0254-6450.2014.05.003