1. Clinical Fellow in Anesthesia, Harvard Medical School; Chief Resident in Anaesthesia, Massachusetts General Hospital.
2. Clinical Fellow in Anesthesia, Harvard Medical School; Senior Resident in Anaesthesia, Massachusetts General Hospital.
3. Assistant Professor of Anesthesia, Harvard Medical School; Assistant Anaesthetist, Massachusetts General Hospital.
4. Attending Cardiovascular Surgeon, Children's Hospital/National Medical Center, Washington, D.C.
5. Professor of Anaesthesia, Harvard Medical School; Anesthetist, Massachusetts General Hospital.