Chinese Journal of Epidemiology, Volume 33, Issue 8,2012, Pages 792-795, doi:10.3760/cma.j.issn.0254-6450.2012.08.008
Chinese Journal of Epidemiology, Volume 33, Issue 8,2012, Pages 850-853, doi:10.3760/cma.j.issn.0254-6450.2012.08.021
Chinese Journal of Epidemiology, Volume 33, Issue 8,2012, Pages 870-871, doi:10.3760/cma.j.issn.0254-6450.2012.08.026
Chinese Journal of Epidemiology, Volume 33, Issue 8,2012, Pages 759-762, doi:10.3760/cma.j.issn.0254-6450.2012.08.001
Chinese Journal of Epidemiology, Volume 33, Issue 8,2012, Pages 877-878, doi:10.3760/cma.j.issn.0254-6450.2012.08.030