1. Department of Anesthesia, Perioperative Medicine and Pain Management, Dalhousie University, Halifax, Nova Scotia, Canada
2. Nuffield Department of Anaesthetics, Oxford University Hospitals National Health Service (NHS) Foundation Trust, Oxford, England
3. Department of Anesthesia, University of Iowa Carver College of Medicine, Iowa City
4. Anesthesia Department, Stanford Health Care, Stanford, California
5. Department of Anesthesiology and Perioperative Medicine, Newton-Wellesley Hospital, Tufts University School of Medicine, Boston, Massachusetts
6. Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University, Stanford, California
7. Department of Anesthesiology, Critical Care and Pain Management, Hospital for Special Surgery, New York, New York
8. Department of Anaesthesia and Intensive Care, Emergency County Hospital, Cluj-Napoca, Romania
9. Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Jacksonville, Florida
10. Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota
11. Department of Radiology, Duke University Medical Center, Durham, North Carolina
12. Yale University School of Medicine, Yale New Haven Hospital and Bridgeport Hospital, New Haven, Connecticut
13. Department of Anesthesiology and Perioperative Medicine, Department of Obstetrics and Gynecology, University of Pittsburgh School of Medicine, University of Pittsburgh Medical Center Magee Hospital, Pittsburgh, Pennsylvania
14. Anesthesiology Institute, Interventional Pain Medicine Department, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates
15. Department of Anaesthesia, London Northwest University Healthcare NHS Trust, London, England
16. Anaesthesiology Department, Creta Interclinic Hospital–Hellenic Healthcare Group, Heraklion, Crete, Greece
17. Walter Reed National Military Medical Center, Bethesda, Maryland
18. Department of Anesthesia, University of Western Ontario, London, Ontario, Canada
19. Medical Education, Anesthesiology, Obstetrics and Gynecology, West Virginia University, Morgantown
20. Department of Anaesthesiology, Intensive Care and Pain Therapy, Saarland University Medical Center and Saarland University Faculty of Medicine, Saarbrücken, Germany
21. Rootstown and Center for Pain Medicine, Western Reserve Hospital, Cuyahoga Falls, Ohio