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From the Departments of Medicine, University of Wisconsin and William S. Middleton Memorial Veterans Hospital, Madison, WI. Accepted for publication Dec. 2, 1995. Address for reprints: William A. Craig, M.D., Wm. S. Middleton Memorial VA Hospital, 2500 Overlook Terrace, Madison, WI 53705. Fax 608-262-7685.
Craig et al. (Fri,) studied this question.
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