1. From the Yale School of Medicine (R.D., P.K.) and Department of Radiology and Biomedical Imaging (K.S.A., S.B., S.C., H.P.F.), Yale School of Medicine, 333 Cedar St, New Haven, CT 06510; Yale School of Management, New Haven, Conn (H.P.F.); and Department of Health Policy and Management, Yale School of Public Health, New Haven, Conn (H.P.F.).