P.454 - Validation of a prognostic score for changes in six-minute walk distance (6MWD) in patients with Duchenne muscular dystrophy (DMD). - Goemans, N.; Hauwe, M. Vanden; Sajeev, G.; Yao, Z.; Mcdonnell, E.; Ward, S.; Signorovitch, J. (Neuromuscular Disorders, 2017)