1. Formerly of the Division of Anesthesiology, College of Medicine, State University of Iowa; present address, Division of Anesthesiology, School of Medicine, University of Washington, Seattle, Washington
2. Department of Psychiatry, College of Medicine, and the Psychopathic Hospital, State University of Iowa, Iowa City, Iowa
3. Department of Surgery, Division of Anesthesiology, and the Department of Pharmacology, College of Medicine, State University of Iowa, Iowa City, Iowa