1. Mongan Institute, Massachusetts General Hospital, Harvard Medical School, Boston
2. Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston
3. Heller School for Social Policy and Management, Brandeis University, Waltham, Massachusetts
4. Vinfen Corporation, Cambridge, Massachusetts
5. Division of Child and Adolescent Psychiatry, Department of Psychiatry, Massachusetts General Hospital, Boston
6. Department of Psychiatry, Harvard Medical School, Boston, Massachusetts
7. Biostatistics Center, Massachusetts General Hospital, Boston
8. Kennedy Krieger Institute, Baltimore, Maryland
9. Down Syndrome Program, Division of Medical Genetics and Metabolism, Department of Pediatrics, Massachusetts General Hospital, Boston
10. Department of Pediatrics, Harvard Medical School, Boston, Massachusetts