[1] Radboud Univ Nijmegen, Med Ctr, Dept Pediat, NL-6500 HB Nijmegen, Netherlands
[2] Radboud Univ Nijmegen, Med Ctr, IGMD, NL-6500 HB Nijmegen, Netherlands
[3] Radboud Univ Nijmegen, Med Ctr, Lab Pediat & Neurol, NL-6500 HB Nijmegen, Netherlands
[4] Radboud Univ Nijmegen, Med Ctr, Dept Human Genet, NL-6500 HB Nijmegen, Netherlands
[5] Univ Heidelberg, Univ Childrens Hosp Heidelberg, Heidelberg, Germany