1. Specialist Clinic of Orthodontics; Public Dental Health Service; Karlstad Sweden
2. Department of Prosthetic Dentistry; Postgraduate Dental Education Center and School of Health and Medical Sciences; Örebro University; Örebro Sweden
3. Dental Research Department; Public Dental Health Service; Örebro County Council and School of Health and Medical Sciences; Örebro University; Örebro Sweden
4. Department of Orthodontics; Postgraduate Dental Education Center; Örebro Sweden