1. 2nd Critical Care Department, Attikon University Hospital, Medical School, National and Kapodistrian University of Athens, 157 72 Athens, Greece
2. Department of Cardiac Surgery, Attikon University Hospital, Medical School, National and Kapodistrian University of Athens, 157 72 Athens, Greece
3. Laboratory of Haematology, Blood Bank Unit, Attikon University Hospital, Medical School, National and Kapodistrian University of Athens, 157 72 Athens, Greece