1. Department of Pediatrics, Dalhousie University, Halifax, Nova Scotia, Canada
2. Sensory Genetic, Neuro-Development, Bloomington, MN
3. Department of Pediatrics/Genetics, University of Kentucky Medical Center, Kentucky Clinic, Lexington, KY
4. Division of Medical Genetics, Department of Pediatrics, St. Louis University, St. Louis, MO
5. Division of Medical Genetics, Department of Pediatrics, University of Washington and Children's Hospital Medical Center, Seattle, WA
6. Pediatrics and Genetics, Gundersen-Lutheran Medical Center, Ltd, La Crosse, WI
7. Genetics and Teratology, Massachusetts General Hospital, Boston, MA
8. Medical Genetics Birth Defects Center, Steven Spielberg Pediatric Research Center, Ahmanson Pediatric Center, SHARE's Child bisability Center, Department of Pediatrics, Cedars-Sinai Medical Center, University Affiliated Program, UCLA School of Medicine, Los Angeles, CA