Platelet Secretion Defects and Acquired von Willebrand Syndrome in Patients With Ventricular Assist Devices oleh Ulrich Geisen, Kerstin Brehm, Georg Trummer, Michael Berchtold‐Herz, Claudia Heilmann, Friedhelm Beyersdorf, Johannes Schelling, Axel Schlagenhauf, Barbara Zieger