1. Department of Metabolic Diseases, Wilhelmina Children's Hospital University Medical Center Utrecht Utrecht The Netherlands
2. Laboratory Genetic Metabolic Diseases, Amsterdam UMC University of Amsterdam, Amsterdam Cardiovascular Sciences, Amsterdam Gastroenterology and Metabolism Amsterdam The Netherlands
3. Section Metabolic Diagnostics, Department of Genetics University Medical Centre Utrecht, Utrecht University Utrecht The Netherlands
4. Department of Endocrinology and Metabolism, Amsterdam UMC University of Amsterdam Amsterdam The Netherlands
5. Department Biologicals, Screening and Innovation Dutch National Institute for Public Health and the Environment Bilthoven The Netherlands
6. Department of Pediatrics, Emma's Children's Hospital, Amsterdam UMC University of Amsterdam Amsterdam The Netherlands
7. Department for Vaccine Supply and Prevention Programmes Dutch National Institute for Public Health and the Environment Bilthoven The Netherlands
8. Reference Laboratory for Neonatal Screening, Centre for Health Protection Dutch National Institute for Public Health and the Environment Bilthoven The Netherlands