[1] Aristotle Univ Thessaloniki, Dept Pediat 1, Pediat Nephrol Unit, Thessaloniki, Greece
[2] PA Kyriakou Childrens Hosp, Dept Nephrol, Athens, Greece
[3] Aristotle Univ Thessaloniki, Sch Med, Div Transplantat, Dept Surg, Thessaloniki, Greece
[4] Hippokrateion Hosp, Thessaloniki, Greece