1. Department of Neurology and Neurophysiology Balgrist University Hospital, University of Zurich Zürich Switzerland
2. Biomedical Research and Study Center Riga Latvia
3. Institute of Molecular Genetics of National Research Centre “Kurchatov Institute” Moscow Russia
4. Department of Biology and Microbiology Riga Stradins University Riga Latvia
5. Rare Disease Center Riga East Clinical University Hospital Riga Latvia
6. Centre of Molecular Biology And Genetics, University Hospital Brno Czech Republic
7. Department of Neurology Amsterdam University Medical Centre, Amsterdam Neuroscience Amsterdam The Netherlands
8. Department of Neurology Erasmus MC University Medical Center Rotterdam The Netherlands
9. Department of Neurology University Medical Centre Ljubljana, Faculty of Medicine, University of Ljubljana Ljubljana Slovenia
10. Clinical Institute of Medical Genetics, University Medical Centre Ljubljana Ljubljana Slovenia
11. Department of Clinical Genetics Institute of Clinical Medicine, University of Tartu Tartu Estonia
12. Department of Clinical Genetics, United Laboratories Tartu University Hospital Tartu Estonia
13. MNM Diagnostics Sp. z o.o. Poznań Poland
14. Department of Hematology, Transplantation and Internal Medicine University Clinical Center of the Medical University of Warsaw Warsaw Poland
15. Central Clinical Hospital of Ministry of the Interior and Administration in Warsaw Warsaw Poland
16. Department of Human and Medical Genetics Institute of Biomedical Sciences, Faculty of Medicine, Vilnius University Vilnius Lithuania
17. Medical Genetics Clinic, Children's Clinical University Hospital Riga Latvia