1. First Department of Adult Cardiac Surgery Onassis Cardiac Surgery Center Athens Greece
2. Department of Pediatric and Congenital Heart Surgery Onassis Cardiac Surgery Center Athens Greece
3. Pediatric Cardiac and Adult Congenital Heart Disease Intensive Care Unit Onassis Cardiac Surgery Center Athens Greece
4. Department of Nephrology and Renal Transplantation, Medical School, National and Kapodistrian University of Athens General Hospital Laiko Athens Greece