CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 29, Issue 12,2008, Pages 1248-1250, doi:10.3321/j.issn:0254-6450.2008.12.018
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 29, Issue 12,2008, Pages 1217-1220, doi:10.3321/j.issn:0254-6450.2008.12.011
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 29, Issue 12,2008, Pages 1262-1265, doi:10.3321/j.issn:0254-6450.2008.12.022
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 29, Issue 12,2008, Pages 1255-1259, doi:10.3321/j.issn:0254-6450.2008.12.020
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 29, Issue 12,2008, Pages 1269-1270, doi:10.3321/j.issn:0254-6450.2008.12.024