1. Instructor in Anaesthesia, Harvard Medical School, and Assistant Clinical Director of Anesthesia, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts
2. Associate Professor of Anaesthesia, Harvard Medical School at Massachusetts General Hospital, and Associate Anesthetist, Massachusetts General Hospital, Boston, Massachusetts
3. Assistant Professor of Anaesthesia, Harvard Medical School at Massachusetts General Hospital, and Associate Anesthetist, Massachusetts General Hospital.
4. Instructor in Anaesthesia, Harvard Medical School at Massachusetts General Hospital, and Assistant Anesthetist, Massachusetts General Hospital