[1] Univ Med Goettingen, Cardiol, Gottingen, Germany
[2] Univ Med Goettingen, Radiol, Gottingen, Germany
[3] Univ Med Luebeck, Cardiol, Lubeck, Germany
[4] Univ Nebraska, Childrens Hosp & Med Cntr, Cardiol, Coll Med, Omaha, NE 68114 USA
[5] Charite, Cardiol, Berlin, Germany
[6] Univ Leipzig, Inst Diagnost & Intervent Radiol, Cardiol, Heart Cntr Leipzig, Leipzig, Germany
[7] Univ Leipzig, Dept Cardiol, Cardiol, Heart Cntr Leipzig, Leipzig, Germany
[8] Univ Med Luebeck, Cardiol, Gottingen, Germany