1. Department of Metabolic Diseases, Wilhelmina Children's HospitalUniversity Medical Center Utrecht, Utrecht University Utrecht the Netherlands
2. Department of Clinical ChemistryUniversity Medical Center Utrecht Utrecht the Netherlands
3. Sylvia Toth Center for the Multidisciplinary Follow up of Lysosomal Storage DisordersUniversity Medical Center Utrecht, Utrecht University Utrecht the Netherlands
4. Laboratory of Translational ImmunologyUniversity Medical Center Utrecht, Utrecht University Utrecht the Netherlands
5. Department of GastroenterologyWilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht University Utrecht the Netherlands
6. Section Cell Biology, Center for Molecular MedicineUniversity Medical Center Utrecht, Utrecht University Utrecht the Netherlands