1. Clinic of Orthodontics, Gothenburg, Public Dental Service, Region Västra Götaland, Sweden
2. Fjärås Public Dental Service Clinic, Region Västra Götaland, Sweden
3. Department of Orthodontics, Institute of Odontology, The Sahlgrenska Academy, University of Gothenburg, Sweden
4. Fridhemsplan Public Dental Service Clinic, Region Stockholm, Stockholm, Sweden
5. The Sahlgrenska Academy, University of Gothenburg and Department of Plastic Surgery, Sahlgrenska University Hospital, Gothenburg, Sweden