CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 30, Issue 10,2009, Pages 1047-1050, doi:10.3760/cma.j.issn.0254-6450.2009.010.016
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CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 30, Issue 10,2009, Pages 1092-1093, doi:10.3760/cma.j.issn.0254-6450.2009.010.031
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 30, Issue 10,2009, Pages 1088-1089, doi:10.3760/cma.j.issn.0254-6450.2009.010.028
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 30, Issue 10,2009, Pages 1005-1009, doi:10.3760/cma.j.issn.0254-6450.2009.010.005