1. Department of Internal Medicine; General Hospital Murska Sobota; Dr. Vrbnjaka 6 SI-9000 Murska Sobota Slovenia
2. Department of Cardiology; University of Hull; Kingston upon Hull UK
3. Department of Cardiology; Erasmus Medical Center; Thoraxcenter Rotterdam The Netherlands
4. Department of Medicine; University Hospital Zürich; Zürich Switzerland
5. Department of Cardiology; Hôpital Pitié Salpétrière; Paris France
6. Department of Medicine; Sahlgrenska University Hospital/Östra; Göteborg Sweden