1. Department of Orthopedic Surgery, Eastern Virginia Medical School, Franklin, Virginia
2. Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina
3. Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
4. Department of Anesthesia, Critical Care and Pain Management, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
5. Department of Anesthesiology, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
6. Biometrics, Pacira BioSciences, Inc., Parsippany, New Jersey
7. Department of Anesthesiology, Fairview Hospital, Cleveland Clinic, Anesthesiology Institute, Outcomes Research, Cleveland, Ohio, USA
8. Department of Anesthesia, Aarhus University Hospital, Aarhus, Denmark