1. Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
2. Wellcome Centre for Mitochondrial Research, Institute of Neuroscience, The Medical School, Newcastle University, Newcastle upon Tyne, UK
3. Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
4. Wellcome Centre for Mitochondrial Research, Institute of Genetics, The Medical School, Newcastle University, Newcastle upon Tyne, UK
5. Department of Inherited Metabolic Disease, Guy's and St Thomas' NHS Foundation Trusts, Evelina London Children's Hospital, London, UK
6. Wellcome Centre for Mitochondrial Research, Institute for Cell and Molecular Biosciences, The Medical School, Newcastle University, Newcastle upon Tyne, UK