1. Department of Cardiology, Leiden University Medical Center, The Netherlands, Albinusdreef 2, 2300 RC Leiden
2. Department of Cardiology, Medical University of Lodz, Kniaziewicza 1/5, 91-347 Lodz, Poland
3. Department of Cardiovascular Diseases, University of Siena, Policlinico Le Scotte, Viale Bracci 16, 53100 Siena, Italy
4. Department of Cardiac Surgery, University Medical Centre Maribor, Ljubljanska Ulica 5, 2000 Maribor, Slovenia
5. Department of Cardiology, University Medical Centre Ljubljana, Zaloska Cesta 7, 1000 Ljubljana, Slovenia
6. Department of Cardiology, University Heart Center, University Hospital Zurich, Ramistrasse 100, 8091 Zurich, Switzerland
7. Cardiovascular Institute, Hospital Clínic, Universitat de Barcelona, Villarroel 170, 08036, Barcelona, Spain
8. Institut d’Investigacions Biomediques August Pi i Sunyer (IDIBAPS), Villarroel 170, 08036 Barcelona, Spain
9. CIBERCV, Instituto de Salud Carlos III, Sinesio Delgado, 4, 28029 Madrid, Spain
10. BHF Centre for Cardiovascular Science, University of Edinburgh, Chancellors Building, Little France Crescent, Edinburgh EH16 4SB, UK
11. Department of Cardiology, Oslo University Hospital, Postboks 4950, Nydalen, 0424 Oslo, Norway
12. Institute for clinical medicince, University of Oslo, Postboks 1171, Blindern, 0318 Oslo, Norway