1. Department of Anesthesia, Indiana University School of Medicine, Indianapolis, Indiana
2. Department of Anesthesiology and Perioperative Medicine, Mayo Clinic College of Medicine, Rochester, Minnesota
3. Department of Anesthesiology, Section of Neuroanesthesia, Aarhus University Hospital, Aarhus, Denmark
4. Choate Rosemary Hall School, Wallingford, Connecticut
5. Department of Anesthesiology, Wake Forest University, Winston-Salem, North Carolina
6. Department of Anesthesiology and Pain Medicine, University of California Davis, Sacramento, California.