CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 31, Issue 6,2010, Pages 714-715, doi:10.3760/cma.j.issn.0254-6450.2010.06.031
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 31, Issue 6,2010, Pages 712-713, doi:10.3760/cma.j.issn.0254-6450.2010.06.029
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 31, Issue 6,2010, Pages 646, doi:10.3760/cma.j.issn.0254-6450.2010.06.010
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 31, Issue 6,2010, Pages 642-646, doi:10.3760/cma.j.issn.0254-6450.2010.06.009
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 31, Issue 6,2010, Pages 665, doi:10.3760/cma.j.issn.0254-6450.2010.06.016