1. Associate Director, Department of Anesthesiology, Cook County Hospital, Chicago, Illinois 60612
2. Attending Physician, Division of Pediatric Anesthesiology, Cook County Hospital, Chicago, Illinois 60612
3. Attending Physician, Department of Anesthesiology, Cook County Hospital, Chicago, Illinois 60612
4. Consultant Anaesthetist, The Middlesex Hospital, London, W. 1, England