1. Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
2. Learning, Informatics, Management, and Ethics, Medical Statistics Unit, Karolinska Institutet, Stockholm, Sweden
3. Department of Oral and Maxillofacial Surgery, Karolinska University Hospital, Stockholm, Sweden
4. Department of Odontology, Umeå University, Sweden
5. Oral and Maxillofacial Surgery, Umeå University Hospital, Umeå, Sweden
6. Department of Oral and Maxillofacial Surgery, Institute of Odontology, The Sahlgrenska Academy at University of Gothenburg, Sweden
7. Department of Clinical Sciences, Faculty of Medicine, Lund University, Lund, Sweden
8. Department of Oral and Maxillofacial Surgery, Skåne University Hospital, Lund, Sweden
9. Department of Oral and Maxillofacial Surgery, Linköping University Hospital, Linköping, Sweden
10. Department of Medical Sciences, Örebro University, Örebro, Sweden
11. Medical Unit Head and Neck, Lung and Skin Cancer, Karolinska University Hospital, Stockholm, Sweden
12. Institute for Surgical Sciences, Oral and Maxillofacial Surgery, Uppsala University, Sweden
13. Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
14. Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
15. Department of Surgery, Åland Central Hospital, Mariehamn, Finland