CHINESE JOURNAL OF ENDEMIOLOGY, Volume 28, Issue 6,2009, Pages 601-603, doi:10.3760/cma.j.issn.1000-4955.2009.06.004
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CHINESE JOURNAL OF ENDEMIOLOGY, Volume 28, Issue 6,2009, Pages 644-648, doi:10.3760/cma.j.issn.1000-4955.2009.06.016
CHINESE JOURNAL OF ENDEMIOLOGY, Volume 28, Issue 6,2009, Pages 662-664, doi:10.3760/cma.j.issn.1000-4955.2009.06.022
CHINESE JOURNAL OF ENDEMIOLOGY, Volume 28, Issue 6,2009, Pages 604-607, doi:10.3760/cma.j.issn.1000-4955.2009.06.005