Determining minimal clinically important differences in the North Star Ambulatory Assessment (NSAA) for patients with Duchenne muscular dystrophy. oleh Vandana Ayyar Gupta, Jacqueline M Pitchforth, Joana Domingos, Deborah Ridout, Mario Iodice, Catherine Rye, Mary Chesshyre, Amy Wolfe, Victoria Selby, Anna Mayhew, Elena S Mazzone, Valeria Ricotti, Jean-Yves Hogrel, Erik H Niks, Imelda de Groot, Laurent Servais, Volker Straub, Eugenio Mercuri, Adnan Y Manzur, Francesco Muntoni, iMDEX Consortium and the U.K. NorthStar Clinical Network