Affiliation: | (1) Department of Psychiatry, University of Texas Southwestern Medical Center at Dallas, P.O. Box 45168, 75245 Dallas, Texas;(2) Department of Orthopaedic Surgery, University of Texas Southwestern Medical Center at Dallas, P.O. Box 45168, 75245 Dallas, Texas;(3) Division of psychology, University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines, 75235-9044 Dallas, Texas |