1. Division of Epidemiology, Faculty of Medicine, Division of Pediatrics and Pediatric Surgery, Harlem Hospital Center, New York, New York
2. Division of Epidemiology, School of Public Health, Gertrude H. Sergievsky Center, Harlem Hospital Center, New York, New York
3. Pediatrics, The New York State Psychiatric Institute, Harlem Hospital Center, New York, New York
4. Departments of Neurosurgery, Harlem Hospital Center, New York, New York