Chinese Journal of Epidemiology, Volume 39, Issue 6,2018, Pages 707-709, doi:10.3760/cma.j.issn.0254-6450.2018.06.002
Chinese Journal of Epidemiology, Volume 39, Issue 6,2018, Pages 750-754, doi:10.3760/cma.j.issn.0254-6450.2018.06.011
Chinese Journal of Epidemiology, Volume 39, Issue 6,2018, Pages 836-840, doi:10.3760/cma.j.issn.0254-6450.2018.06.027
Chinese Journal of Epidemiology, Volume 39, Issue 6,2018, Pages 858-861, doi:10.3760/cma.j.issn.0254-6450.2018.06.031
Chinese Journal of Epidemiology, Volume 39, Issue 6,2018, Pages 765-769, doi:10.3760/cma.j.issn.0254-6450.2018.06.014