1. Department of Neurology, College of Physicians and Surgeons, Columbia University, New York 10032
2. Department of Neurosurgery, College of Physicians and Surgeons
3. Department of Medicine, College of Physicians and Surgeons
4. International Institute for the Study of Human Reproduction and Department of Obstetrics and Gynecology, College of Physicians and Surgeons
5. Departments of Urology and Pathology, College of Physicians and Surgeons
6. Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15213