1. Section of Orthodontics; Faculty of Health Sciences; Aarhus University; Aarhus Denmark
2. Specialist Oral Health Center for Western Norway; Stavanger Norway
3. Orofacial Pain Unit; Department of Orofacial Pain and Jaw Function; Malmö University; Malmö Sweden
4. Department of Maxillofacial Surgery; Aarhus University Hospital; Aarhus Denmark
5. Department of Pediatrics; Aarhus University Hospital; Aarhus Denmark