1. Division of Paediatric and Adolescent Medicine Oslo University Hospital OsloNorway
2. Institute of Clinical Medicine University of Oslo OsloNorway
3. Norwegian Advisory Unit on Long‐term Mechanical Ventilation Thoracic Department Haukeland University Hospital BergenNorway
4. Physiotherapy Department Haukeland University Hospital Bergen Norway
5. Centre for Neuromuscular Disorders and Home Mechanical Ventilation UZ Brussel‐Inkendaal Vlezenbeek Belgium
6. Department of Paediatrics Haukeland University Hospitals BergenNorway
7. Department of Clinical Science University of Bergen BergenNorway
8. Department of Paediatric Medicine Stavanger University Hospital HF Stavanger Norway