Respiratory and upper limb function as outcome measures in ambulant and non-ambulant subjects with Duchenne muscular dystrophy: A prospective multicentre study por Ricotti, V, Selby, V, Ridout, D, Domingos, J, Decostre, V, Mayhew, A, Eagle, M, Butler, J, Guglieri, M, der Holst, MV, Jansen, M, Verschuuren, JJGM, de Groot, IJM, Niks, EH, Servais, L, Straub, V, Voit, T, Hogrel, JY, Muntoni, F