Chinese Journal of Epidemiology, Volume 41, Issue 1,2020, Pages 25-30, doi:10.3760/cma.j.issn.0254-6450.2020.01.006
Chinese Journal of Epidemiology, Volume 41, Issue 1,2020, Pages 103-110, doi:10.3760/cma.j.issn.0254-6450.2020.01.019
Chinese Journal of Epidemiology, Volume 41, Issue 1,2020, Pages 36-41, doi:10.3760/cma.j.issn.0254-6450.2020.01.008
Chinese Journal of Epidemiology, Volume 41, Issue 1,2020, Pages 79-84, doi:10.3760/cma.j.issn.0254-6450.2020.01.015
Chinese Journal of Epidemiology, Volume 41, Issue 1,2020, Pages 62-67, doi:10.3760/cma.j.issn.0254-6450.2020.01.012