1. Departments of Anesthesiology and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania. lee.fleisher@uphs.upenn.edu.
2. Department of Anesthesiology, Washington University School of Medicine, St. Louis, Missouri.
3. Anaesthetics and Anesthesia Departments, Harvard Medical School, Boston, Massachusetts; Massachusetts General Hospital, Boston, Massachusetts.
4. Departments of Anesthesiology and Critical Care, The Johns Hopkins University, Baltimore, Maryland.