1. Department of Clinical Neurosciences for Children, Oslo University Hospital, Oslo, Norway
2. Department of Research, Sunnaas Rehabilitation Hospital, Nesodden, Norway
3. Vestfold Hospital Trust, The Cerebral Palsy Register of Norway, Tønsberg, Norway
4. Department of Laboratory Medicine, Children’s and Women’s Health, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
5. Department of Psychology, University of Oslo, Oslo, Norway