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CHINESE JOURNAL OF ENDEMIOLOGY, Volume 30, Issue 4,2011, Pages 416-419, doi:10.3760/cma.j.issn.1000-4955.2011.04.018
CHINESE JOURNAL OF ENDEMIOLOGY, Volume 30, Issue 4,2011, Pages 403-404, doi:10.3760/cma.j.issn.1000-4955.2011.04.014
CHINESE JOURNAL OF ENDEMIOLOGY, Volume 30, Issue 4,2011, Pages 466, doi:10.3760/cma.j.issn.1000-4955.2011.04.034