CHINESE JOURNAL OF PRACTICAL NURSING, Volume 27, Issue 9,2011, Pages 20-21, doi:10.3760/cma.j.issn.1672-7088.2011.09.093
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CHINESE JOURNAL OF PRACTICAL NURSING, Volume 27, Issue 9,2011, Pages 3-5, doi:10.3760/cma.j.issn.1672-7088.2011.09.083