1. Department of Neurological and Psychiatric Sciences, University of Bari, Bari, Italy
2. Department of Ophthalmology and Otolaryngology, University of Bari, Bari, Italy
3. Department of Neurosciences, Ophthalmology, and Genetics, University of Genoa, Genoa, Italy
4. Department of Neurosciences, Psychiatry, and Anesthesiology, University of Messina, Messina, Italy
5. Department of Neurology, University of Verona, Verona, Italy
6. Department of Neurological Sciences and Neuromed Institute, University of Rome La Sapienza, Rome, Italy