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Professor of Anesthesia, Section Head Obstetric and Gynecologic Anesthesia Bowman Gray School of Medicine Wake Forest University Winston-Salem, North Carolina 27103Sheila E. Cohen, M.B., C.B., F.R.C.A. Professor of Anesthesia, Director Obstetric Anesthesia School of Medicine Stanford University Stanford, California 94305
David M. Dewan (1994) studied this question.