Affiliation: | 1. Consultant, Department of Orthodontics, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands;2. Associate professor, Department of Orthodontics, Dental School, University of Athens, Athens, Greece;3. Research fellow, Department of Orthodontics and Oral Biology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands; private practice, Gorinchem, The Netherlands;4. Visiting assistant professor, Department of Orthodontics and Dentofacial Orthopaedics, University of Bern, Bern, Switzerland; private practice, Corfu, Greece;5. Associate professor, Institute of Epidemiology and Preventive Medicine, National Taiwan University, Taipei, Taiwan;6. Professor and chair, Department of Orthodontics and Dentofacial Orthopaedics, University of Bern, Bern, Switzerland |