1. Molecular Psychiatry Laboratory, Division of Psychiatry; University College London; London United Kingdom
2. Medical Genetics Unit, Medical Genetics Laboratory; Bambino Gesù Pediatric Hospital, IRCCS; Rome Italy
3. Institut de génétique médicale, CHU Lille; Lille France
4. Nottinghamshire Healthcare NHS Foundation Trust; Nottingham United Kingdom
5. Service de génétique clinique, CHU Lille; Lille France
6. EA7364, RADEME, Université de Lille; Lille France
7. Centre de génétique chromosomique, Hopital Saint-Vincent de Paul; Lille France
8. Kennedy Center, Department of Clinical Genetics; Copenhagen University Hospital, Rigshospitalet; Copenhagen Denmark
9. Hunter Genetics; Waratah New South Wales Australia
10. University of Newcastle; Callaghan New South Wales Australia
11. North East Thames Regional Genetics Service Laboratory; London United Kingdom
12. Service de Cytogénétique, Plateau technique de Biologie; CHU Dijon France
13. Centre de référence Anomalies du développement et Syndromes malformatifs, FHU TRANSLAD; CHU Dijon France
14. Sheffield Clinical Genetics Service, Sheffield Children's Hospital, Western Bank; Sheffield United Kingdom
15. King's College London, Florence Nightingale Faculty of Nursing and Midwifery; London United Kingdom
16. Genomics England, Dawson Hall, Charterhouse Square; London United Kingdom
17. Information Officer, Unique - The Rare Chromosome Disorder Support Group (www.rarechromo.org), The Stables, Station Road West; Oxted, Surrey United Kingdom
18. Center for Medical Genetics; Ghent University Hospital; Ghent Belgium
19. Department of Clinical Genetics; Leiden University Medical Center; Leiden The Netherlands
20. Department of Forensic and Neurodevelopmental Science; Institute of Psychiatry, Psychology and Neuroscience, Kings College London; London United Kingdom
21. Behavioural and Brain Sciences Unit; Institute of Child Health, University College London; London United Kingdom