[1] Univ Med Ctr Utrecht, Ctr Mol Med, Utrecht, Netherlands
[2] KNAW, Hubrecht Inst, Utrecht, Netherlands
[3] Inst Visually Impaired, Bartimeus, Doorn, Netherlands
[4] Acad Med Ctr, Dept Pediat Gastroenterol & Nutr, Amsterdam, Netherlands
[5] Univ Med Ctr Utrecht, Dept Clin Chem & Haematol, Utrecht, Netherlands
[6] Acad Med Ctr, Lab Genet Metab Dis, Amsterdam, Netherlands
[7] Dept Pediat Gastroenterol & Metab Dis, Utrecht, Netherlands
[8] Univ Med Ctr Groningen, Beatrix Childrens Hosp, Sect Metab Dis, Utrecht, Netherlands
[9] Oasi Inst Res Mental Retardat & Brain Aging IRCCS, Troina, Italy
[10] Univ Med Ctr Utrecht, Dept Med Physiol, Utrecht, Netherlands