1 First Department of Cardiology, National and Kapodistrian University, "Hippokration" Hospital, Athens, Greece. Electronic address: lkoliastasis@gmail.com.
2 First Department of Cardiology, National and Kapodistrian University, "Hippokration" Hospital, Athens, Greece.
3 Silesian Center for Heart Diseases, Zabrze, Poland.
4 Second Department of Cardiology, Interbalkan medical center, Thessaloniki, Greece.
5 Department of Cardiology, Naval Hospital of Athens, Athens, Greece.
6 Department of Cardiology, University Hospital of Heraklion, Crete, Greece.
7 Department of Hygiene, Social-Preventive Medicine & Medical Statistics, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece.