1. University of California, Irvine Medical Center, Department of Emergency Medicine, Orange, California
2. Duke University School of Medicine, Durham, North Carolina
3. Duke University Medical Center, Department of Surgery, Durham, North Carolina
4. New York Presbyterian Hospital/Columbia University Medical Center, Department of Emergency Medicine, New York, New York
5. Duke University Medical Center, Department of Medicine, Durham, North Carolina
6. Brigham and Women’s Hospital, Department of Medicine, Boston, Massachusetts
7. Duke University Medical Center, Department of Community and Family Medicine, Durham, North Carolina