1 Beth Israel Deaconess Medical Center, Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School, Boston, MA, USA.
2 Barrow Neurological Institute, Phoenix, AZ, USA.
3 Valley Anesthesiology and Pain Consultants - Envision Physician Services, Phoenix, AZ; University of Arizona College of Medicine-Phoenix, Department of Anesthesiology, Phoenix, AZ; Creighton University School of Medicine, Department of Anesthesiology, Omaha, NE, USA.