1. Assistant Professor, Department of Anesthesiology, University of Utah, Salt Lake City, Utah
2. Visiting Assistant Professor, Department of Anesthesiology, University of Virginia, Charlottesville, Virginia
3. Assistant Professor, Department of Anesthesiology, University of Virginia, Charlottesville, Virginia
4. Robert D. Dripps Professor, Department of Anesthesia, University of Pennsylvania Medical Center, Philadelphia, Pennsylvania