1. Third Department of Cardiology, Ippokratio General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
2. Second Propaedeutic Department of Internal Medicine, Ippokratio General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
3. St Luke’s Hospital, Thessaloniki, Greece
4. Department of Respiratory Medicine, Ippokratio General Hospital, Thessaloniki, Greece
5. First Department of Cardiology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece