5 Inselspital, University Hospital of Bern, Bern, Switzerland.
6 Metabolic Department, Great Ormond Street Hospital NHS Foundation Trust, Institute for Child Health, NIHR Biomedical Research Centre UCL, London, UK.
7 Centre for Inherited Metabolic Diseases, Copenhagen University Hospital (Rigshospitalet), Copenhagen, Denmark.
8 Reference Centre for Lysosomal Disease, Trousseau University Hospital, Paris, France.
9 Dr. Von Hauner Children's Hospital, University of Munich, Munich, Germany.
10 Institute of Neurosciences, University Hospital of Montpellier, Montpellier, France.