P.453 - Consistency between natural history and clinical trial placebo arms for 48-week changes in six-minute walk distance (6MWD) in patients with Duchenne muscular dystrophy (DMD). - Mercuri, E.; Goemans, N.; Sajeev, G.; Yao, Z.; Mcdonnell, E.; Ward, S.; Signorovitch, J. (Neuromuscular Disorders, 2017)