1. Department of Anesthesiology, Critical Care, and Pain Medicine, Harvard Medical School, Beth Israel Deaconess Medical Center, Boston, Massachusetts
2. Department of Anesthesiology, Creighton University School of Medicine, Phoenix Regional Campus, Phoenix, Arizona
3. Division of Pain, Valley Anesthesiology and Pain Consultants, Phoenix, Arizona
4. Department of Anesthesiology and Pain Medicine, Valley Anesthesiology and Pain Consultants, Phoenix, Arizona
5. Department of Anesthesiology, University of Arizona College of Medicine Phoenix, Phoenix, Arizona
6. Department of Anesthesiology, Creighton University School of Medicine, Omaha, Nebraska