JOURNAL OF POSTGRADUATES OF MEDICINE, Volume 28, Issue 16,2005, Pages 13-15, doi:10.3760/cma.j.issn.1673-4904.2005.16.006
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JOURNAL OF POSTGRADUATES OF MEDICINE, Volume 28, Issue 16,2005, Pages 54-55, doi:10.3760/cma.j.issn.1673-4904.2005.16.026