[1] Charite Campus Virchow Klinikum CVK, Dept Internal Med & Cardiol, Berlin, Germany
[2] Univ Leipzig, Inst Med Informat Stat & Epidemiol, Leipzig, Germany
[3] Univ Wurzburg, Dept Internal Med 1, Wurzburg, Germany
[4] Comprehens Heart Failure Ctr, Wurzburg, Germany
[5] Univ Hosp Giessen & Marburg, Dept Internal Med Cardiol, Giessen, Germany
[6] Univ Med Ctr Gottingen UMG, Dept Cardiol & Pneumol, Gottingen, Germany