1 Department of Metabolic Diseases, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, The Netherlands.
2 Department of Pediatrics & Metabolic Diseases, Radboud Centre for Mitochondrial Medicine, Amalia Children's Hospital, Radboud University Medical Center, Nijmegen, The Netherlands; Department of Pediatrics, Emma Children's Hospital, Amsterdam University Medical Centers, Amsterdam, The Netherlands.
3 Department of Metabolic Diseases, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, The Netherlands. Electronic address: s.fuchs@umcutrecht.nl.