1. Division of Cardiology, General Hospital Murska Sobota, Dr. Vrbnjaka 6, Murska Sobota SI-9000, Slovenia
2. Faculty of Medicine, University of Ljubljana, Ljubljana SI-1000, Slovenia
3. Faculty of Natural Sciences and Mathematics, University of Maribor, Maribor, Slovenia
4. Berlin Institute of Health Center for Regenerative Therapies, Charite, Universitätsmedizin Berlin, Berlin, Germany
5. Department of Cardiology (Virchow Klinikum), Charité - Universitätsmedizin Berlin, German Centre for Cardiovascular Research (DZHK), Partner Site Berlin, Berlin, Germany
6. Department of Cardiology/Internal Medicine, Heart Center Leipzig-University Leipzig, Leipzig, Germany
7. Dedinje Cardiovascular Institute, Belgrade, Serbia
8. Faculty of Medicine, University of Belgrade, Belgrade, Serbia