1. Unit of Molecular Neurogenetics, Pierfranco and Luisa Mariani Center for Research on Children's Mitochondrial Disorders, Institute of Neurology “Carlo Besta”–IRCCS Foundation, Milan, Italy.
2. Division of Neurology, Dino Ferrari Center, Ospedale Maggiore Policlinico, Cà Granda-IRCCS Foundation, Milan, Italy.
3. Neuroscience Department, Azienda Ospedaliera Fatebenefratelli e Oftalmico, Milan, Italy.