CHINESE JOURNAL OF POSTGRADUATES OF MEDICINE, Volume 34, Issue 4,2011, Pages 19-21, doi:10.3760/cma.j.issn.1673-4904.2011.04.007
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CHINESE JOURNAL OF POSTGRADUATES OF MEDICINE, Volume 34, Issue 4,2011, Pages 17-19, doi:10.3760/cma.j.issn.1673-4904.2011.04.006
CHINESE JOURNAL OF POSTGRADUATES OF MEDICINE, Volume 34, Issue 4,2011, Pages 24-26, doi:10.3760/cma.j.issn.1673-4904.2011.04.009