1. Institute of Ophthalmology, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
2. UOC di Oculistica, Fondazione Policlinico Universitario A. Gemelli-IRCCS, 00168 Rome, Italy
3. UOC di Neurologia, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
4. Department of Ophthalmology, University of Turin, 10126 Turin, Italy
5. Department of Cardiovascular, Endocrine-Metabolic Diseases and Ageing, Istituto Superiore di Sanità, 00161 Rome, Italy
6. Institute of Neurology, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
7. John Walton Muscular Dystrophy Research Centre, Newcastle Hospitals NHS Foundation Trusts, Newcastle University, Newcastle Upon Tyne NE1 3BZ, UK