1. Department of Plastic and Reconstructive Surgery, Oslo University Hospital, Oslo, Norway
2. Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
3. Department of Nursing and Health Promotion, Acute and Critical illness, Faculty of Health Sciences, Oslo Metropolitan University, Oslo, Norway
4. Department of Neonatal Intensive Care, Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
5. Centre for Rare Disorders, Rikshospitalet, Oslo University Hospital, Oslo, Norway
6. Oslo Centre of Biostatistics and Epidemiology, Research Support Services, Oslo University Hospital, Oslo, Norway
7. Faculty of Health Sciences, Oslo Metropolitan University, Oslo, Norway