1. 2nd Department of Critical Care and Pulmonary Hypertension Clinic, University of Athens, Medical School, Attikon General Hospital, Athens, Greece
2. nd Department of Critical Care and Pulmonary Hypertension Clinic, University of Athens, Medical School, Attikon General Hospital, Athens, Greece
3. 2nd Department of Cardiology, University of Athens, Medical School, Attikon General Hospital, Athens, Greece
4. 2nd Department of Cardiology and Pulmonary Hypertension Clinic, University of Athens, Medical School, Attikon General Hospital, Athens, Greece