1. Department of Paediatric Dentistry, Institute of Odontology, Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
2. Public Dental Service Region Värmland Karlstad Sweden
3. Public Dental Service Västra Götaland County Gothenburg Sweden
4. Specialist Clinic for Orthodontics Public Dental Service Region Västra Götaland Gothenburg Sweden
5. Department of Orthodontics, Institute of Odontology, Sahlgrenska Academy University of Gothenburg Gothenburg Sweden