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* Surgical Care Center, Baltimore VA Medical Center, and Department of Surgery, University of Maryland School of Medicine, Baltimore, MD, USA **Correspondence address: Barbara L Bass, MD, FACS, Surgical Care Center 112, Baltimore VA Medical Center, 10 N Greene St, Baltimore, MD 21201, USA. Received August 20, 2002; accepted August 20, 2002.
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Barbara L. Bass (2002) studied this question.
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