1. Department of Pediatric Neurosciences Fondazione IRCCS Istituto Neurologico Carlo Besta Milan Italy
2. Rare Neurodegenerative and Neurometabolic Diseases Unit, Department of Clinical Neurosciences Fondazione IRCCS Istituto Neurologico Carlo Besta Milan Italy
3. Department of Neurology Azienda Ospedaliera Universitaria “San Giovanni di Dio e Ruggi d'Aragona” Salerno Italy
4. Department of Biostatistics and Computational Biology University of Rochester Rochester New York USA
5. Department of Neurology The University of Iowa Hospitals and Clinics Iowa City Iowa USA
6. Janssen Pharmaceutical Companies of Johnson and Johnson Titusville New Jersey USA