[1] Univ Heart Ctr Jena, Jena, Germany
[2] Univ Amsterdam, Acad Med Ctr, NL-1105 AZ Amsterdam, Netherlands
[3] Ernst Moritz Arndt Univ Greifswald, Greifswald, Germany
[4] Luzerner Kantonsspital, Luzern, Switzerland
[5] Swiss Cardiovasc Ctr, Bern, Switzerland
[6] Asklepios Klin St Georg, Hamburg, Germany
[7] Univ Zurich Hosp, CH-8091 Zurich, Switzerland
[8] Lukaskrankenhaus, Neuss, Germany
[9] Kliniken Maria Hilf, Monchengladbach, Germany
[10] Heart Ctr Brandenburg, Bernau, Germany
[11] Soder Sjukhuset, Stockholm, Sweden
[12] Univ Uppsala Hosp, Uppsala, Sweden
[13] Univ Hosp Modena, Modena, Italy
[14] Fdn Cardioctr Ticino, Lugano, Switzerland