CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 7,2007, Pages 697-699, doi:10.3760/j.issn:0254-6450.2007.07.018
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 7,2007, Pages 656-658, doi:10.3760/j.issn:0254-6450.2007.07.007
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 7,2007, Pages 688-691, doi:10.3760/j.issn:0254-6450.2007.07.016
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 7,2007, Pages 625-630, doi:10.3760/j.issn:0254-6450.2007.07.001
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 28, Issue 7,2007, Pages 726-727, doi:10.3760/j.issn:0254-6450.2007.07.034