CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 25, Issue 11,2004, Pages 929-933, doi:10.3760/j.issn:0254-6450.2004.11.003
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CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 25, Issue 11,2004, Pages 958-961, doi:10.3760/j.issn:0254-6450.2004.11.010
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 25, Issue 11,2004, Pages 977, doi:10.3760/j.issn:0254-6450.2004.11.026
CHINESE JOURNAL OF EPIDEMIOLOGY, Volume 25, Issue 11,2004, Pages 1005, doi:10.3760/j.issn:0254-6450.2004.11.030