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CHINESE JOURNAL OF POSTGRADUATES OF MEDICINE, Volume 31, Issue 35,2008, Pages 58-60, doi:10.3760/cma.j.issn.1673-4904.2008.35.025
CHINESE JOURNAL OF POSTGRADUATES OF MEDICINE, Volume 31, Issue 35,2008, Pages 53-55, doi:10.3760/cma.j.issn.1673-4904.2008.35.023