DMD and Duchenne muscular dystrophy: Finkel Finkel RS RS Flanigan Flanigan KM KM Wong Wong B B Phase 2a study of ataluren-mediated dystrophin production in patients with nonsense mutation Duchenne muscular dystrophy Phase 2a study of ataluren-mediated dystrophin production in patients with nonsense mutation Duchenne muscular dystrophy PLoS ONE PLoS ONE 2013 2013 8 8 e81302 e81302 10.1371/journal.pone.0081302 10.1371/journal.pone.0081302 24349052 24349052