Chinese Journal of Epidemiology, Volume 40, Issue 2,2019, Pages 247-250, doi:10.3760/cma.j.issn.0254-6450.2019.02.023
Chinese Journal of Epidemiology, Volume 40, Issue 2,2019, Pages 237-240, doi:10.3760/cma.j.issn.0254-6450.2019.02.021
Chinese Journal of Epidemiology, Volume 40, Issue 2,2019, Pages 123-128, doi:10.3760/cma.j.issn.0254-6450.2019.02.001
Chinese Journal of Epidemiology, Volume 40, Issue 2,2019, Pages 191-195, doi:10.3760/cma.j.issn.0254-6450.2019.02.013
Chinese Journal of Epidemiology, Volume 40, Issue 2,2019, Pages 142-146, doi:10.3760/cma.j.issn.0254-6450.2019.02.004