1. Department of Anesthesiology and Critical Care Medicine, Division of Pain Medicine, Johns Hopkins University, Baltimore, Maryland, USA
2. Department of Anesthesiology, University of Rochester School of Medicine and Dentistry, Rochester, New York, and Department of Neurology, Center for Human Experimental Therapeutics, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
3. Division of Biobehavioral Health Sciences, University of Pennsylvania–School of Nursing, Philadelphia, Pennsylvania, USA
4. Public Health and Community Medicine Program, Tufts University School of Medicine, Boston, Massachusetts, USA
5. Department of Anesthesiology, Perioperative, and Pain Medicine, Brigham and Women’s Hospital, Boston, Massachusetts, USA
6. Danish Pain Research Center, Department of Clinical Medicine, Aarhus University, and Department of Neurology, Aarhus University Hospital, Aarhus, Denmark
7. Center for Autonomic and Peripheral Nerve Disorders, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
8. Cancer Pain Program, Northwestern University, Feinberg School of Medicine, Chicago, Illinois, USA
9. Jane B. Pettit Pain and Headache Center, Children’s Wisconsin, Departments of Anesthesiology and Pediatrics, Medical College of Wisconsin, Milwaukee, Wisconsin, USA