Dr. Huidekoper works as a pediatrician metabolic diseases in the Center for Lysosomal and Metabolic Diseases at the Erasmus MC University Hospital in Rotterdam, the Netherlands. In his current position he is treating and following children over the whole spectrum of inborn errors of metabolism. He has a special research interest in Cerebrotendinous Xanthomatosis (CTX) and classic late-infantile neuronal ceroid lipofuscinosis (CLN2 disease) for which he is leading the clinical program in the Netherlands. Together with dr. Frédéric Vaz, Amsterdam University Medical Center, he has successfully developed a newborn screening method for CTX, for which now steps towards implementation in the Netherlands are taken. He also co-coordinates the subnetwork for lysosomal storage disorders of the European Reference Network for Hereditary Metabolic Disorders (MetabERN) and is leader of the work package on clinical outcome research within the United for Metabolic Diseases (UMD) consortium in the Netherlands.