[1] UT Southwestern Med Ctr, Dept Phys Therapy, Dallas, TX USA
[2] Stanford Univ, Sch Med, Dept Neurol, Palo Alto, CA 94304 USA
[3] Boston Childrens Hosp, Dept Phys & Occupat Therapy, Boston, MA USA
[4] Childrens Hosp Philadelphia, Dept Neurol & Phys Therapy, Philadelphia, PA 19104 USA
[5] Newcastle Univ, Translat & Clin Res Inst, John Walton Muscular Dystrophy Res Ctr, Newcastle Upon Tyne, Tyne & Wear, England
[6] Newcastle Hosp NHS Fdn Trust, Newcastle Upon Tyne, Tyne & Wear, England