1. Orthodontic Specialty Registrar, Eastman Dental Institute, University College London, UK
2. Orthodontic Senior Specialty Registrar, King's College London Dental Institute, UK
3. Senior Clinical Teaching Fellow in Restorative Dentistry, Bristol Dental School, University of Bristol, UK
4. Specialist Practitioner, Cathedral Orthodontics, Cardiff, UK
5. Professor of Orthodontics and Dean of Health Sciences, University of Bristol, UK
6. Professor of Orthodontics, Bristol Dental School, University of Bristol, Lower Maudlin Street, Bristol B1 2LY, UK