Defining clinical endpoints in limb girdle muscular dystrophy: a GRASP-LGMD study oleh Amy Doody, Lindsay Alfano, Jordi Diaz-Manera, Linda Lowes, Tahseen Mozaffar, Katherine D. Mathews, Conrad C. Weihl, Matthew Wicklund, Man Hung, Jeffrey Statland, Nicholas E. Johnson, On behalf of the GRASP-LGMD Consortium