1. Professor, Department of Anesthesiology and Perioperative Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
2. Associate Professor, Department of Cardiothoracic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
3. Professor, Department of Anesthesiology, University of Colorado Medical Center, Denver, CO, USA
4. Professor, Department of Anesthesiology, Vanderbilt University Medical Center, Vanderbilt, Nashville, TN, USA