1. Clinic of Nephrology and Renal Transplantation NKUA Medical SchoolLaiko General Hospital Athens Greece
2. Heart Failure and Transplant Units Onassis Cardiac Surgery Center Athens Greece
3. Molecular Immunopathology and Histocompatibility Unit Onassis Cardiac Surgery Center Athens Greece
4. Department of Hygiene, Epidemiology and Medical Statistics NKUA Medical School Athens Greece
5. Pediatric Research Laboratory Faculty of Nursing NKUASchool of Health Sciences Athens Greece
6. Hellenic Scientific Society for the Study of AIDS Sexually Transmitted and Emerging Diseases Athens Greece