Effect and safety of treatment with ACE-inhibitor Enalapril and β-blocker metoprolol on the onset of left ventricular dysfunction in Duchenne muscular dystrophy - a randomized, dou... oleh Sven Dittrich, Erika Graf, Regina Trollmann, Ulrich Neudorf, Ulrike Schara, Antje Heilmann, Maja von der Hagen, Brigitte Stiller, Janbernd Kirschner, Robert Dalla Pozza, Wolfgang Müller-Felber, Katja Weiss, Katja von Au, Markus Khalil, Reinald Motz, Christoph Korenke, Martina Lange, Ekkehard Wilichowski, Joseph Pattathu, Friedrich Ebinger, Nicola Wiechmann, Rolf Schröder, on behalf of the German Competence Network for Congenital Heart Defects and the Treat-NMD Neuromuscular Network Investigators list of additional local Investigators and co-workers of the German Competence Network for Congenital Heart Defects and the Treat-NMD Neuromuscular Network