JOURNAL OF THE FOURTH MILITARY MEDICAL UNIVERSITY, Volume 20, Issue 8,1999, Pages 690-691, doi:10.3321/j.issn:1000-2790.1999.08.015
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JOURNAL OF THE FOURTH MILITARY MEDICAL UNIVERSITY, Volume 20, Issue 8,1999, Pages 723-725, doi:10.3321/j.issn:1000-2790.1999.08.026
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