Dr Gradimir Dimitrijevic has 30 years’ experience in transfusion medicine, most of the time as expert in clinical transfusion but with very good experience in therapeutic apheresis, and blood component therapy. From few years ago introduced irradiation in Serbia ,in Novi Sad, and most of the blood components that are irradiated are for oncology, hematology in adults and children. That is his experience in all this together.