1. Immunology Department National Peripheral Histocompatibility Center Hippokratio General Hospital of Thessaloniki Thessaloniki Greece
2. 1st Department of Pediatrics Pediatric Nephrology Unit Aristotle University of Thessaloniki Hippokratio General Hospital of Thessaloniki Thessaloniki Greece
3. Immunology Department National Tissue Typing Center General Hospital of Athens "G.Gennimatas" Athens Greece
4. Pediatric Nephrology Department Panagiotis & Aglaia Kyriakou Children's Hospital Athens Greece
5. Solid Organ Transplantation Center Aristotle University of Thessaloniki Hippokratio General Hospital of Thessaloniki Thessaloniki Greece