Development, reliability and validity of the Charcot-Marie-Tooth disease Pediatric Scale (CMTPedS) by Eichinger Kate, Ramchandren Sindhu, Pagliano Emanuela, Moroni Isabella, Pareyson Davide, Reilly Mary, Muntoni Francesco, Acsadi Gyula, Glanzman Allan, Patzko Agnes, Swingle Polly, Laura Matilde, Hiscock Andy, Estilow Tim, Finkel Richard, Burns Joshua, Ryan Monique, Ouvrier Robert, Shy Michael, Shy Rosemary