CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 27, Issue 6,2006, Pages 461-463, doi:10.3760/j.issn:0254-6450.2006.06.001
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 27, Issue 6,2006, Pages 483-487, doi:10.3760/j.issn:0254-6450.2006.06.006
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 27, Issue 6,2006, Pages 508-512, doi:10.3760/j.issn:0254-6450.2006.06.011
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 27, Issue 6,2006, Pages 551-552, doi:10.3760/j.issn:0254-6450.2006.06.025
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 27, Issue 6,2006, Pages 479-482, doi:10.3760/j.issn:0254-6450.2006.06.005