1. Section of Orthodontics Aarhus University Aarhus Denmark
2. Department of Plastic and Oral Surgery Boston Children's Hospital Boston Massachusetts
3. Division of Oral and Maxillofacial Surgery, Departments of Surgery and Pediatrics Emory University School of Medicine Atlanta Georgia
4. Section of Orthodontics and Department of Oral and Maxillofacial Surgery Aarhus University Hospital Aarhus Denmark
5. University of Naples Federico II Naples Italy
6. Department of Orthodontics University Hospital Tübingen Tübingen Germany
7. Department of Pediatric Oral Health and Orthodontics UZB University Center for Dentistry Basel, University of Basel Basel Switzerland
8. Department of Pediatrics, University Hospital of North Norway and the Pediatric Research Group, Department of Clinical Medicine UiT The Arctic University of Norway Tromsø Norway
9. Department of Oral and Maxillofacial Surgery, School of Dental Medicine University of Pennsylvania Philadelphia
10. The Public Dental Health Competence Centre of North Norway, and the Department of Clinical Medicine, Faculty of Health Sciences UiT The Arctic University of Norway Tromsø Norway
11. Massachusetts General Hospital, Harvard School of Dental Medicine Boston Massachusetts
12. Department of Maxillofacial Radiology Institute of Clinical Dentistry, University of Oslo Oslo Norway
13. The Hospital for Sick Children University of Toronto Toronto Ontario Canada
14. University of Alabama at Birmingham
15. Children's Hospital of Philadelphia and University of Pennsylvania Perelman School of Medicine Philadelphia Pennsylvania
16. Department of Pediatrics and Adolescent Medicine Aarhus University Hospital Aarhus Denmark
17. Section of Paediatric Dentistry, Dental School University of Turin Turin Italy
18. Department of Otorhinolaryngology, Division of Oral and Maxillofacial Surgery, University Hospital of North Norway, Public Dental Service Competence Centre of North Norway, and Department of Clinical Dentistry UiT The Arctic University of Norway Tromsø Norway
19. Faculty of Odontology, Orofacial Pain Unit Malmö University Malmö Sweden
20. Seattle Children's Hospital Seattle Washington
21. Faculty of Medicine and Health Technology, and Department of Ear and Oral Diseases, Tampere University, Tampere, Finland, and Institute of Dentistry, Faculty of Health Sciences, University of Eastern Finland and Department of Oral and Maxillofacial Diseases, Kuopio University Hospital Kuopio Finland
22. Department of Diagnostic Imaging University Children's Hospital Zürich Zürich Switzerland
23. Alberta Children's Hospital and University of Calgary Calgary Alberta Canada