[1] Johannes Gutenberg Univ Mainz, Univ Med Ctr, CTH, Langenbeckstr 1,Bldg 403, D-55131 Mainz, Germany
[2] Democritus Univ Thrace, Dept Cardiol, Alexandroupolis 68100, Greece
[3] Charite Univ Med Berlin, Campus Virchow Klinikum, Dept Internal Med & Cardiol, Augustenburgerpl 1, D-13353 Berlin, Germany
[4] Univ Med Ctr Goettingen, Clin Cardiol & Pneumol, Heart Ctr, Robert Koch Str 40, D-37075 Gottingen, Germany