1. Instructor in Anesthesia, Harvard Medical School, Staff Anesthesiologist, Brigham and Women's Hospital.
2. Fellow in Anesthesia, Brigham and Women's Hospital.
3. Fellow in Perinatology, Brigham and Women's Hospital.
4. Assistant Professor of Obstetrics and Gynecology, Harvard Medical School, Brigham and Women's Hospital. Accepted for publication May 27, 1989.