[1] Royal Victoria Infirm, Dept Paediat Nephrol, Childrens Kidney Unit, Newcastle Upon Tyne NE1 4LP, Tyne & Wear, England
[2] Royal Victoria Infirm, Dept Paediat Surg, Newcastle Upon Tyne NE1 4LP, Tyne & Wear, England
[3] Royal Victoria Infirm, Dept Radiol, Newcastle Upon Tyne NE1 4LP, Tyne & Wear, England
[4] Mother & Child Hlth Inst Serbia, Dept Nephrol, Belgrade, Serbia Monteneg