1. The PKU Clinic, Kennedy Centre, Centre for Paediatric and Adolescent Medicine, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
2. Department of Clinical Genetics, Applied Human Molecular Genetics, Kennedy Center, Rigshospitalet, Denmark
3. Centre for Inherited Metabolic Diseases, Centre for Paediatric and Adolescent Medicine, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
4. Arla Foods Ingredients Group P/S, Viby J, Denmark
5. Department of Biomedicine, Aarhus University, Aarhus, Denmark
6. Department of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark
7. Department of Odontology, Copenhagen University, Copenhagen, Denmark
8. Institute of Clinical Medicine, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
9. Department of Clinical Biochemistry, University of Copenhagen, Rigshospitalet, Copenhagen, Denmark