1. Active Malformations Surveillance Program, Department of Pediatric Newborn Medicine, Brigham and Women's Hospital; Harvard Medical School; Boston Massachusetts
2. Medical Genetics Unit, MassGeneral Hospital for Children; Harvard Medical School; Boston Massachusetts
3. Department of Pathology; Massachusetts General Hospital, and Harvard Medical School; Boston Massachusetts
4. Hunt Consulting Associates; Chapel Hill North Carolina
5. Department of Pediatrics; Harvard Medical School; Boston Massachusetts