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CHINESE JOURNAL OF ENDEMIOLOGY, Volume 24, Issue 3,2005, Pages 255-257, doi:10.3760/cma.j.issn.1000-4955.2005.03.007
CHINESE JOURNAL OF ENDEMIOLOGY, Volume 24, Issue 3,2005, Pages 262-263, doi:10.3760/cma.j.issn.1000-4955.2005.03.009
CHINESE JOURNAL OF ENDEMIOLOGY, Volume 24, Issue 3,2005, Pages 245-247, doi:10.3760/cma.j.issn.1000-4955.2005.03.004