1. Specialist Registrar in Orthodontics, Kent and Canterbury NHS Trust and GKT Dental Institute, UK
2. Professor of Oral and Maxillofacial Imaging, The University of Manchester, Higher Cambridge Street, Manchester M15 6FH, UK
3. Professor in the School of Dental Sciences, Newcastle University and NUTH, Queen Victoria Road, Newcastle upon Tyne, NE1 4LP, UK