CHINESE JOURNAL OF PRACTICAL NURSING, Volume 24, Issue 4,2008, Pages 57-59, doi:10.3760/cma.j.issn.1672-7088.2008.04.030
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CHINESE JOURNAL OF PRACTICAL NURSING, Volume 24, Issue 4,2008, Pages 21-22, doi:10.3760/cma.j.issn.1672-7088.2008.04.008