Jasper M Morrow1, Maria Pia Sormani2. 1. From the Department of Neuromuscular Diseases (J.M.M.), Queen Square UCL Institute of Neurology, London, UK; and Department of Health Sciences (DISSAL) (M.P.S.), University of Genoa, and IRCCS Ospedale Policlinico San Martino, Italy. j.morrow@ucl.ac.uk. 2. From the Department of Neuromuscular Diseases (J.M.M.), Queen Square UCL Institute of Neurology, London, UK; and Department of Health Sciences (DISSAL) (M.P.S.), University of Genoa, and IRCCS Ospedale Policlinico San Martino, Italy.