1. Department of Bioinformatics, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
2. Department of Molecular Genetics, Function & Therapy, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
3. Department of Neurogenetics, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
4. National Hospital for Neurology and Neurosurgery, Queen Square, University College London Hospitals NHS Foundation Trust, London, UK
5. Department of Neuropediatrics, University Hospital Essen, Duisburg-Essen University, Germany
6. Division of Neurology, Department of Medicine, Childrens Hospital of Eastern Ontario Research Institute, University of Ottawa, Ottawa, ON, Canada
7. Department of Neurology, Medical University of Warsaw, Warsaw, Poland
8. Department of Neurology, Central Hospital of Medical University of Warsaw, Poland
9. Department of Neurology, Eginitio hospital, Medical School of Athens, Athens, Greece
10. Neuroepidemiology Department, Cyprus Institute of Neurology & Genetics, Nicosia, Cyprus
11. Wellcome Trust Centre for Mitochondrial Research, Institute of Neuroscience, University of Newcastle, Newcastle, UK
12. Division of Neurology, Department of Medicine, The Ottawa Hospital, Ottawa, ON, Canada
13. Centro Nacional de AnálisisGenómico, Center for Genomic Regulation (CNAG-CRG), Barcelona Institute of Science and Technology (Bist), Barcelona, Spain