1. Department of Anesthesiology and Pain Management, University of Texas Southwestern, Dallas, Texas
2. Department of Anesthesiology, Perioperative & Pain Medicine, Stanford Center for Biomedical Ethics, Palo Alto, California
3. Department of Anesthesiology and Critical Care Medicine, University of New Mexico, Albuquerque, New Mexico
4. Stanford Center for Biomedical Ethics, Stanford University, Palo Alto, California
5. Department of Anesthesiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
6. Department of Anesthesiology, Washington University in St. Louis, St. Louis, Missouri.