Key points are not available for this paper at this time.
From the Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, PA. Presented at the American Surgical Association 130th Annual Meeting; April 9, 2010; Chicago,IL. Reprints: Richard A Cooper MD University of Pennsylvania Colonial Penn Center 3641 Locust Walk Philadelphia, PA 19104. E-mail: email protected.
Richard A. Cooper (Wed,) studied this question.