1. Department of Medical Genetics, Faculty of Medicine, Medical University of Sofia, Sofia, Bulgaria
2. Department of Genetics, Faculty of Biology, Sofia University ‘St. Kliment Ohridski’, Sofia, Bulgaria
3. GMDL Cell Genetics, Sofia, Bulgaria
4. Department of Molecular Biology, Genetics and Microbiology, Faculty of Natural Sciences and Mathematics, ‘Ss. Cyril and Methodius’ University, Skopje, North Macedonia
5. Department of Neurology, University Hospital ‘Alexandrovska’, Sofia, Bulgaria
6. Bulgarian Academy of Sciences, Sofia, Bulgaria