Categorizing natural history trajectories of ambulatory function measured by the 6-minute walk distance in patients with Duchenne muscular dystrophy. Mercuri E, Signorovitch JE, Swallow E, Song J, Ward SJ; DMD Italian Group; Trajectory Analysis Project (cTAP). Neuromuscul Disord. 2016 Sep;26(9):576-83. doi: 10.1016/j.nmd.2016.05.016. Epub 2016 May 27 Eugenio Mercuri a,*, James Edward Signorovitch b,c, Elyse Swallow b, Jinlin Song b, Susan J. Ward c for the DMD Italian Group # and the collaborative Trajectory Analysis Project…