Corrigendum: Off-Label Use of Ataluren in Four Non-ambulatory Patients With Duchenne Muscular Dystrophy: Effects on Cardiac and Pulmonary Function and Muscle Strength - Ebrahimi-Fakhari, Daniel; Dillmann, Ulrich; Flotats-Bastardas, Marina; Poryo, Martin; Abdul-Khaliq, Hashim; Shamdeen, Mohammed Ghiath; Mischo, Bernhard; Zemlin, Michael; Meyer, Sascha (Frontiers in Pediatrics, 2019)