1. Assistant Professor of Anaesthesia, Harvard Medical School; Assistant Anesthetist, Department of Anesthesia.
2. Research Nurse, Department of Anesthesia.
3. Professor of Radiology, Harvard Medical School; Radiologist, Department of Radiology.
4. Professor of Anaesthesia, Harvard Medical School; Anesthetist-in-Chief, Department of Anesthesia and Critical Care, Beth Israel Hospital, Boston, Massachusetts.