1. Departments of Pediatrics and Genetics and the Howard Hughes Medical Institute, Stanford University School of Medicine (B.D.W., C.B.K., M.M.O., G.S.B.), Stanford, California 94305-5428
2. Mental Health Research Institute (D.B., S.J.W.), University of Michigan School of Medicine, Ann Arbor, Michigan 48109-0682
3. Department of Surgery (I.G.), University of Michigan School of Medicine, Ann Arbor, Michigan 48109-0682