Summary: The objective of this study is to assess the safety and tolerability of 10, 10, 20 milligrams per kilogram (mg/kg) ataluren in participants with nmDBMD who had prior exposure to ataluren in a PTC sponsored clinical trial or treatment plan, and siblings of those participants (provided those participants have completed the placebo-controlled portion of the trial). The treatment will continue under t...

Summary: Dystrophinopathy is a term of X-linked recessive genetic disease, including Duchenne Muscular Dystrophy, Becker Muscular Dystrophy, and the X-linked dilated cardiomyopathy. The aim of this study is to determine the clinical spectrum and natural progression of dystrophinopathy in a prospective multicenter natural history study, to assess the clinical, genetic of patients with dystrophinopathy to op...