1. School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece;
2. 1st Department of Cardiology, AHEPA Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece;
3. Society of Junior Doctors, Athens, Greece;
4. VA Eastern Colorado Healthcare System and Division of Cardiology, University of Colorado, Denver, CO, USA;
5. Department of Medicine, Jacobi Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA