1. Department of Anesthesiology, University of Kansas School of Medicine, Kansas City, Kansas
2. Department of Anesthesiology, Wake Forest University School of Medicine, Winston Salem, North Carolina
3. Department of Biobehavioral Nursing and Health Systems, University of Washington, Seattle, Washington
4. Department of Orthopedic Surgery, Geisel School of Medicine at Dartmouth University, Hanover, New Hampshire
5. Department of Anesthesiology, NorthShore University Health System, Evanston, Illinois
6. Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University, Stanford, California
7. Department of Anesthesiology, Vanderbilt University Medical Center, Nashville, Tennessee
8. Department of Neurobiology and Anatomy, Wake Forest University School of Medicine, Winston Salm, North Carolina, USA