CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 9,2003, Pages 810-814, doi:10.3760/j.issn:0254-6450.2003.09.016
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CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 9,2003, Pages 798-800, doi:10.3760/j.issn:0254-6450.2003.09.013
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 9,2003, Pages 782, doi:10.3760/j.issn:0254-6450.2003.09.030
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 24, Issue 9,2003, Pages 850, doi:10.3760/j.issn:0254-6450.2003.09.038