1. “Saint Petersburg State University” Cardiology Center, Saint Petersburg, Russian Federation
2. 1st Department of Internal Medicine, Comenius University and University Hospital, Bratislava, Slovakia
3. Faculty of Medicine, University of Oviedo and Central University Hospital of Asturias (HUCA), Oviedo, Spain
4. 2nd Department of Surgery, Faculty of Medicine, Masaryk University and St. Annés University Hospital, Brno, Czech Republic