CHINESE JOURNAL OF PRACTICAL NURSING, Volume 20, Issue 17,2004, Pages 8-9, doi:10.3760/cma.j.issn.1672-7088.2004.17.005
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CHINESE JOURNAL OF PRACTICAL NURSING, Volume 20, Issue 17,2004, Pages 6-7, doi:10.3760/cma.j.issn.1672-7088.2004.17.004