1. TRS National Resource Centre for Rare Disorders, Nesoddtangen, Norway
2. Department of Research, Lovisenberg Diaconal Hospital, Oslo, Norway
3. Department of Psychology, University of Oslo, Oslo, Norway
4. Department of Research, Sunnaas Rehabilitation Hospital, Nesoddtangen, Norway
5. Children’s Clinic, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway