DMD and Duchenne muscular dystrophy: Initial results from one of these ongoing clinical trials with μDys showed that more than 80% of the muscle fibers were micro-dystrophin positive with significant expression of μDys in post-treatment biopsies (95.8% compared to normal) (Sarepta Therapeutics Announces Positive Updated Results from Micro-Dystrophin Trial to Treat Patients with DMD.