ACADEMIC JOURNAL OF SECOND MILITARY MEDICAL UNIVERSITY, Volume 20, Issue 9,1999, Pages 617-620, doi:10.3321/j.issn:0258-879X.1999.09.008
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ACADEMIC JOURNAL OF SECOND MILITARY MEDICAL UNIVERSITY, Volume 20, Issue 9,1999, Pages 601-604, doi:10.3321/j.issn:0258-879X.1999.09.003