1. Division of Pain Medicine, Department of Anesthesiology, University of Virginia, Charlottesville, Virginia
2. Division of Pain Medicine, Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota
3. Department of Anesthesiology, Emory School of Medicine, Atlanta, Georgia
4. Pain Medicine Division, Department of Anesthesiology, College of Medicine, University of Florida, Gainesville, Florida
5. Clinical Anesthesiology, Vanderbilt University Medical Center, Nashville, Tennessee
6. Department of Anesthesia, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
7. Physical Medicine and Rehabilitation, Anesthesiology, and Orthopedic, Montefiore Medical Center, New York, New York
8. Pain Management Department of Anesthesia and Critical Care Medicine, University of Chicago, Chicago, Illinois, USA