1. Regional Section Mental Health, Intellectual Disabilities/Autism Oslo University Hospital Oslo Norway
2. NevSom – Norwegian Centre of Expertise for Neurodevelopmental Disorders and Hypersomnias Oslo University Hospital Oslo Norway
3. TAKO‐Centre, National Resource Centre for Oral Health in Rare Medical Conditions Lovisenberg Diakonale Hospital Oslo Norway
4. Faculty of Dentistry University of Oslo Oslo Norway
5. The Norwegian Association for Prader‐Willi Syndrome Oslo Norway