[1] Univ Munster, Dept Pediat, D-48129 Munster, Germany
[2] Univ Munster, Inst Clin Radiol, D-48129 Munster, Germany
[3] Univ Tubingen, Maternal PKU Study, Tubingen, Germany
[4] Univ Marburg, Dept Pediat, Marburg, Germany
[5] Univ Hamburg, Dept Pediat, Hamburg, Germany