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CHINESE JOURNAL OF PREVENTIVE MEDICINE, Volume 43, Issue 4,2009, Pages 282-286, doi:10.3760/cma.j.issn.0253-9624.2009.04.004
CHINESE JOURNAL OF PREVENTIVE MEDICINE, Volume 43, Issue 4,2009, Pages 305-308, doi:10.3760/cma.j.issn.0253-9624.2009.04.009
CHINESE JOURNAL OF PREVENTIVE MEDICINE, Volume 43, Issue 4,2009, Pages 344-345, doi:10.3760/cma.j.issn.0253-9624.2009.04.025