1. Division of General Neurology and Ataxia Unit, Department of Neurology Universidade Federal de São Paulo Sao Paulo Brazil
2. Moorfields Eye Hospital NHS Foundation Trust London United Kingdom
3. Institute of Ophthalmology University College London London United Kingdom
4. The National Hospital for Neurology and Neurosurgery University College London Hospitals NHS Foundation Trust London United Kingdom
5. Department of Ophthalmology Universidade Federal de São Paulo Sao Paulo Brazil
6. Department of Neurology School of Medical Sciences—University of Campinas (UNICAMP) São Paulo Brazil
7. Department of Clinical Neurosciences, Cambridge Centre for Brain Repair and MRC Mitochondrial Biology Unit University of Cambridge Cambridge United Kingdom
8. Cambridge Eye Unit, Addenbrooke's Hospital Cambridge University Hospitals Cambridge United Kingdom