[1] Univ Bonn, Med Ctr, Dept Neuropathol, Bonn, Germany
[2] Univ Amsterdam, Acad Med Ctr, Dept Human Genet, NL-1105 AZ Amsterdam, Netherlands
[3] Emma Childrens Hosp AMC, Pediat Oncol, Amsterdam, Netherlands
[4] Newcastle Univ, Sch Med, Northern Inst Canc Res, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
[5] Univ Med Ctr Hamburg Eppendorf, Hamburg, Germany