1. School of Medicine, University of Texas Southwestern, Dallas2Department of Surgery, North Texas Veterans Affairs Health Care System, Dallas
2. Department of Medicine, Brigham and Women’s Hospital, Boston, Massachusetts
3. School of Medicine, University of Texas Southwestern, Dallas
4. Biomedical Library, University of Texas Southwestern, Dallas
5. School of Medicine, University of Texas Southwestern, Dallas2Department of Surgery, North Texas Veterans Affairs Health Care System, Dallas5Department of Biomedical Engineering, University of Texas, Arlington6Deputy Editor, JAMA