1. Division of Medical Genetics; A. I. duPont Hospital for Children; Wilmington Delaware
2. University of California; San Francisco California
3. Munroe-Meyer Institute for Genetics and Rehabilitation; University of Nebraska Medical Center; Omaha Nebraska
4. Department of Pediatrics; New York Medical College; Valhalla New York
5. Genetic Medicine Central California; Fresno California
6. University of Washington; Seattle Washington
7. Department of Biomedical Research; Nemours' Children's Clinic; Wilmington Delaware