CHINESE JOURNAL OF MODERN NURSING, Volume 15, Issue 9,2009, Pages 844-845, doi:10.3760/cma.j.issn.1674-2907.2009.09.017
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CHINESE JOURNAL OF MODERN NURSING, Volume 15, Issue 9,2009, Pages 898, doi:10.3760/cma.j.issn.1674-2907.2009.09.045
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