1. Wellcome Trust Centre for Mitochondrial Research, Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, UK
2. Department of Pediatric Neurology, Royal Victoria Infirmary, Newcastle upon Tyne Hospitals NHS Trust, UK
3. Department of Pediatrics, Semmelweis University, Budapest, Hungary
4. Wellcome Trust Mitochondrial Research Centre, Institute for Ageing and Health, Newcastle University, Newcastle upon Tyne, UK
5. Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, UK
6. Department of Molecular Genetics and Diagnostics, NIEH, Budapest, Hungary