1. Department of Anesthesiology, University of Cincinnati Medical Center, Cincinnati, Ohio
2. Department of Anesthesia and Perioperative Medicine, Medical University of South Carolina, Charleston, South Carolina
3. Department of Anesthesiology, Medstar Washington Hospital Center, Washington, DC
4. Department of Anesthesiology, Weil Cornell Medical College, New York, New York
5. Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University, Stanford, California
6. Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina
7. Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
8. Department of Anesthesiology, Columbia University, New York, New York
9. Department of Anesthesiology, Yale School of Medicine, New Haven, Connecticut
10. VA Connecticut Healthcare System, West Haven, Connecticut
11. Department of Anesthesiology, Hospital of Special Surgery, Weill Cornell Medical College, New York, New York
12. Missoula Anesthesiology, Missoula, Montana
13. The International Heart Institute of Montana, Missoula, Montana.