1. Department of Surgery, Weill Cornell Medicine, New York, New York
2. Center for Surgery and Health Economics, Department of Surgery, University of Pennsylvania, Philadelphia
3. Leonard David Institute of Health Economics, University of Pennsylvania, Philadelphia
4. Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia
5. Department of Surgery, University of California, San Francisco
6. Department of Otolaryngology–Head and Neck Surgery, Harvard Medical School and Center for Surgery and Public Health, Brigham and Women’s Hospital, Boston, Massachusetts
7. Department of Surgery, University of Michigan, Ann Arbor
8. Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia