Chinese Journal of Epidemiology, Volume 41, Issue 3,2020, Pages 331-336, doi:10.3760/cma.j.issn.0254-6450.2020.03.010
Chinese Journal of Epidemiology, Volume 41, Issue 3,2020, Pages 446-451, doi:10.3760/cma.j.issn.0254-6450.2020.03.031
Chinese Journal of Epidemiology, Volume 41, Issue 3,2020, Pages 400-405, doi:10.3760/cma.j.issn.0254-6450.2020.03.023
Chinese Journal of Epidemiology, Volume 41, Issue 3,2020, Pages 358-362, doi:10.3760/cma.j.issn.0254-6450.2020.03.015
Chinese Journal of Epidemiology, Volume 41, Issue 3,2020, Pages 395-399, doi:10.3760/cma.j.issn.0254-6450.2020.03.022