Chinese Journal of Epidemiology, Volume 36, Issue 4,2015, Pages 364-367, doi:10.3760/cma.j.issn.0254–6450.2015.04.015
Chinese Journal of Epidemiology, Volume 36, Issue 4,2015, Pages 360-363, doi:10.3760/cma.j.issn.0254–6450.2015.04.014
Chinese Journal of Epidemiology, Volume 36, Issue 4,2015, Pages 349-353, doi:10.3760/cma.j.issn.0254–6450.2015.04.012
Chinese Journal of Epidemiology, Volume 36, Issue 4,2015, Pages 402-404, doi:10.3760/cma.j.issn.0254–6450.2015.04.023
Chinese Journal of Epidemiology, Volume 36, Issue 4,2015, Pages 405-408, doi:10.3760/cma.j.issn.0254–6450.2015.04.024