1. Laboratory Corporation of America/Dynacare, Department of Cytogenetics; Seattle, Washington
2. Laboratory Corporation of America, Center for Molecular Biology and Pathology, Department of Cytogenetics, Research Triangle Park; North Carolina
3. Mailman Center for Child Development, Department of Human Genetics; University of Miami; Miami, Florida
4. Children's Hospital of King's Daughter; Norfolk, Virginia
5. Specially for Children; Austin, Texas
6. Victorian Clinical Genetics Services; Murdoch Children's Research Institute, Royal Children's Hospital; Melbourne; Australia
7. Laboratoire de Génétique Médicale; Hopital Jeanne de Flandre; CHRU, Lille; France
8. Service de Génétique; CHU CAEN; France