Chinese Journal of Epidemiology, Volume 39, Issue 4,2018, Pages 487-490, doi:10.3760/cma.j.issn.0254-6450.2018.04.020
Chinese Journal of Epidemiology, Volume 39, Issue 4,2018, Pages 505-509, doi:10.3760/cma.j.issn.0254-6450.2018.04.024
Chinese Journal of Epidemiology, Volume 39, Issue 4,2018, Pages 391-393, doi:10.3760/cma.j.issn.0254-6450.2018.04.001
Chinese Journal of Epidemiology, Volume 39, Issue 4,2018, Pages 478-482, doi:10.3760/cma.j.issn.0254-6450.2018.04.018
Chinese Journal of Epidemiology, Volume 39, Issue 4,2018, Pages 439-442, doi:10.3760/cma.j.issn.0254-6450.2018.04.010