1. 1st Critical Care Department, School of Medicine, National and Kapodistrian University of Athens, 'Evangelismos'
Hospital, Athens, Greece
2. 3rd Department of Cardiology, School of Medicine, National and Kapodistrian University of
Athens, 'Sotiria' Hospital, Athens, Greece
3. 1st Department of Propaedeutic and Internal Medicine, School of Medicine,
National and Kapodistrian University of Athens, 'Laiko' General Hospital, Athens, Greece