CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 26, Issue 8,2005, Pages 549-550, doi:10.3760/j.issn:0254-6450.2005.08.001
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 26, Issue 8,2005, Pages 558, doi:10.3760/j.issn:0254-6450.2005.08.020
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 26, Issue 8,2005, Pages 554-558, doi:10.3760/j.issn:0254-6450.2005.08.003
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 26, Issue 8,2005, Pages 583-587, doi:10.3760/j.issn:0254-6450.2005.08.009
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 26, Issue 8,2005, Pages 577, doi:10.3760/j.issn:0254-6450.2005.08.023