1. UMDNJ-Robert Wood Johnson Medical School, Piscataway, New Jersey.
2. Present address: Department of Pathology, University of Virginia Heath System, Charlottesville, Virginia.
3. UMDNJ-Women's Health Institute, New Brunswick, New Jersey.
4. UMDNJ-School of Public Health, Department of Epidemiology, Piscataway, New Jersey.
5. Washington University, Department of Surgery, St. Louis, Missouri.
6. UMDNJ-Robert Wood Johnson Medical School, Department of Psychiatry, Piscataway, New Jersey.
7. Present address: New England Research Institutes, Watertown, Massachusetts.