1. Manchester Centre for Genomic Medicine, St Mary's Hospital; Manchester Academic Health Science Centre (MAHSC); Manchester UK
2. Manchester Centre for Genomic Medicine, Institute of Human Development; University of Manchester; Manchester UK
3. Centre de Génétique Humaine; Institut de Pathologie et Génétique; Charleroi Belgium
4. Northern Ireland Regional Genetics Service; Belfast City Hospital; Belfast UK
5. Manchester Royal Eye Hospital; MAHSC; Manchester UK
6. Department of Clinical Genetics, Churchill Hospital; Oxford University Hospitals NHS Trust; Oxford UK
7. Murdoch Children's Research Institute; Royal Children's Hospital; Melbourne Victoria Australia
8. Department of Paediatrics; University of Melbourne; Melbourne Victoria Australia
9. Department of Clinical Genetics; Erasmus University Medical Center (Erasmus MC); Rotterdam The Netherlands
10. Center for Medical Genetics; Ghent University; Ghent Belgium
11. Department of Paediatrics and Molecular Genetics, The Hospital for Sick Children; University of Toronto; Toronto Canada