1 Department of Anesthesiology and Critical Care Medicine, Johns Hopkins Hospital, Baltimore, Maryland.
2 Department of Anesthesiology and Pain Medicine, University of Ottawa, Ottawa, Canada.
3 Department of Anesthesiology, Geisel School of Medicine and Dartmouth Health, Hanover, New Hampshire.
4 Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina.
5 Department of Anesthesiology, Vanderbilt University Medical Center, Nashville, Tennessee.
6 Department of Anesthesia and Perioperative Care, University of California-San Francisco, San Francisco, California.
7 Washington Medical Commission, Seattle, Washington.
8 Department of Anesthesia and Perioperative Medicine, Medical University of South Carolina, Charleston, South Carolina.
9 Department of Anesthesiology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania.
10 Department of Surgery, David Geffen School of Medicine, University of California-Los Angeles, Los Angeles, California; Veterans Affairs Greater Los Angeles Health Care System, Los Angeles, California.
11 Division of Geriatric Medicine, Department of Medicine, University of California-San Francisco, San Francisco, California.
12 Department of Anesthesiology and Perioperative Medicine, David Geffen School of Medicine, University of California-Los Angeles, Los Angeles, California.
13 American Society of Anesthesiologists, Schaumburg, Illinois.
14 Welch Medical Library, Johns Hopkins University, Baltimore, Maryland.
15 Division of Epidemiology and Biostatistics, University of Chicago, Chicago, Illinois.
16 Committee on Practice Parameters, American Society of Anesthesiologists, Schaumburg, Illinois; Department of Anesthesiology & Pain Medicine, University of Washington, Seattle, Washington.