FOREIGN MEDICAL SCIENCES(NURSING FOREING MEDICAL SCIENCE), Volume 20, Issue 4,2001, Pages 157-160, doi:10.3760/cma.j.issn.1673-4351.2001.04.030
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FOREIGN MEDICAL SCIENCES(NURSING FOREING MEDICAL SCIENCE), Volume 20, Issue 4,2001, Pages 169-170, doi:10.3760/cma.j.issn.1673-4351.2001.04.011
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