Authors: Nils Kucher; Peter Boekstegers; Oliver J Müller; Christian Kupatt; Jan Beyer-Westendorf; Thomas Heitzer; Ulrich Tebbe; Jan Horstkotte; Ralf Müller; Erwin Blessing; Martin Greif; Philipp Lange; Ralf-Thorsten Hoffmann; Sebastian Werth; Achim Barmeyer; Dirk Härtel; Henriette Grünwald; Klaus Empen; Iris Baumgartner Journal: Circulation Date: 2013-11-13 Impact factor: 29.690