1. Institute of Clinical Medicine University of Oslo Oslo Norway
2. Department of Paediatrics Vestfold Hospital Trust Tønsberg Norway
3. Norwegian National Unit for Newborn Screening, Division of Paediatric and Adolescent Medicine Oslo University Hospital Oslo Norway
4. Department of Physiotherapy and Rehabilitation Vestfold Hospital Trust Tønsberg Norway
5. Department of Medical Biochemistry Vestfold Hospital Trust Tønsberg Norway