1. Department of Plastic Surgery, Haukeland University Hospital, and PhD candidate, Department of Global Public Health and Primary Care, University of Bergen;
2. Department of Plastic Surgery, Haukeland University Hospital, and Postdoctoral researcher, Department of Global Public Health and Primary Care, University of Bergen;
3. Center for Clinical Research
4. Department of Plastic Surgery, Haukeland University Hospital
5. Haukeland University Hospital;
6. Department of Plastic Surgery, Haukeland University Hospital, and Department of Clinical Dentistry, University of Bergen, Bergen, Norway.