From Paediatric Neurology and Centro Clinico Nemo (M. Pane, C.P., R.d.S., G.C., S.L.), Catholic University and Fondazione Policlinico Gemelli IRCCS, Rome; Department of Clinical and Experimental Medicine (S.M., M.S., G.V., E.M.), University of Messina and Centro Clinico Nemo, Messina; Neurorehabilitation Unit (V.S., E.A.), University of Milan, Centro Clinico Nemo, Niguarda Hospital, Milan; Center of Myology and Neurodegenerative Disorders (C.B., M. Pedemonte, G.B.), Istituto Giannina Gaslini, Genoa; Unit of Neuromuscular and Neurodegenerative Disorders (M.C., A.D., E.B.), Bambino Gesù Children's Hospital, Rome; and Institute of Genomic Medicine (F.D.T.), Catholic University, Rome, Italy. From Paediatric Neurology and Centro Clinico Nemo (M. Pane, C.P., R.d.S., G.C., S.L.), Catholic University and Fondazione Policlinico Gemelli IRCCS, Rome; Department of Clinical and Experimental Medicine (S.M., M.S., G.V., E.M.), University of Messina and Centro Clinico Nemo, Messina; Neurorehabilitation Unit (V.S., E.A.), University of Milan, Centro Clinico Nemo, Niguarda Hospital, Milan; Center of Myology and Neurodegenerative Disorders (C.B., M. Pedemonte, G.B.), Istituto Giannina Gaslini, Genoa; Unit of Neuromuscular and Neurodegenerative Disorders (M.C., A.D., E.B.), Bambino Gesù Children's Hospital, Rome; and Institute of Genomic Medicine (F.D.T.), Catholic University, Rome, Italy. eugeniomaria.mercuri@unicatt.it.