1. Department of Anesthesiology and Critical Care Medicine, University of New Mexico School of Medicine, Albuquerque, NM, USA
2. Department of Critical Care Medicine, Providence Sacred Heart Medical Center, Spokane, WA, USA
3. Department of Anesthesiology, University of Colorado School of Medicine, Aurora, CO, USA
4. Department of Anesthesiology, Vanderbilt University Medical Center, Nashville, TN, USA