1 Department of Clinical Medicine, University of Bergen, Bergen, Norway.
2 Department of Neurology, Haukeland University Hospital, Bergen, Norway.
3 Department of Human Nutrition, Foods, and Exercise and the Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia, USA.
4 Wellcome Centre for Mitochondrial Research, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK.
5 The Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK.
6 Genetics Unit. Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
7 Mitochondrial Research Group, UCL Great Ormond Street Institute of Child Health, and Metabolic Unit, Great Ormond Street Hospital NHS Foundation Trust, London, UK.
8 Unit of Medical Genetics and Neurogenetics, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy.
9 Department of Clinical and Experimental Medicine, Neurological Institute, University of Pisa, Italy.
10 Department of Neurology, Metabolic Unit. Hospital Sant Joan de Déu, Barcelona, Spain. CIBERER, Instituto de Salud Carlos III, Barcelona, Spain.
11 MRC Centre for Neuromuscular Diseases, UCL Queen Square Institute of Neurology and National Hospital for Neurology and Neurosurgery, London, United Kingdom.
12 Department of Pharmacology and Toxicology, Radboud Institute for Molecular Life Sciences, Radboud Center for Mitochondrial Medicine, Radboudumc, Nijmegen, The Netherlands.
13 Radboudumc Amalia Children's Hospital, Radboud Center for Mitochondrial Medicine, Radboudumc, Nijmegen, The Netherlands.