[1] Hippokrateion Hosp, Natl Peripheral Histocompatibil Ctr, Thessaloniki, Greece
[2] Gennimatas Gen Hosp, Immunol Dept, Athens, Greece
[3] Gennimatas Gen Hosp, Natl Tissue Typing Ctr, Athens, Greece
[4] Childrens Hosp P&A Kyriakou, Dept Pediat Nephrol, Athens, Greece
[5] Aristotle Univ Thessaloniki, Pediat Nephrol Unit, Dept Pediat 1, Med Sch,Hippokrat Gen Hosp, Thessaloniki, Greece
[6] Aristotle Univ Thessaloniki, Solid Organ Transplantat Ctr, Sch Med, Hippokrat Gen Hosp, Thessaloniki, Greece