1. Department of Clinical Genetics Erasmus University Medical Centre Rotterdam The Netherlands
2. Department of Clinical Genetics The Cyprus Institute of Neurology & Genetics and Archbishop Makarios III Medical Centre Nicosia Cyprus
3. Department of Paediatrics Sykehuset Østfold HF Fredrikstad Norway
4. Department of Clinical Genetics Guy's and St Thomas' NHS Foundation Trust London UK
5. Department of Clinical Genetics Children's Hospital Ireland at Crumlin Dublin Ireland
6. South West Thames Regional Genetic Service, St George's Hospital Medical School London UK
7. Department of Child Neurology Medical University of Silesia Katowice Poland
8. Victorian Clinical Genetics Services, Murdoch Children's Research Institute Melbourne Australia
9. Department of Paediatrics University of Melbourne Melbourne Australia
10. Neurology Clinic D, The Cyprus Institute of Neurology & Genetics Nicosia Cyprus
11. Department of Genetics University Medical Centre Groningen Groningen The Netherlands