1. Medical Research Council Mitochondrial Biology Unit, University of Cambridge, Cambridge CB2 0XY, UK
2. Department of Neurology, Columbia University Medical Center, New York, NY 10032, USA
3. Department of Chemistry, Life Sciences and Environmental Sustainability - University of Parma, Parma 43121, Italy
4. Graduate Program in Areas of Basic and Applied Biology (GABBA), University of Porto, 4099-002, Portugal
5. Metabolic Unit, A. Meyer Children's Hospital, Florence 50139, Italy
6. Pediatric Neurology Unit and Laboratories, “A. Meyer” Children's Hospital, University of Florence, 50139, Italy
7. Broad Institute of MIT & Harvard, Cambridge, MA 02142, USA
8. Department of Molecular Biology and Howard Hughes Medical Institute, Massachusetts General Hospital, and Department of Systems Biology, Harvard Medical School, Boston, MA 02115, USA