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Chinese Journal of Postgraduates of Medicine, Volume 35, Issue 15,2012, Pages 57-59, doi:10.3760/cma.j.issn.1673-4904.2012.15.024
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Chinese Journal of Postgraduates of Medicine, Volume 35, Issue 15,2012, Pages 25-27, doi:10.3760/cma.j.issn.1673-4904.2012.15.009