Affiliation: | 1. Department of Orthodontics, 251 Air Force General Hospital, Athens, Greece;2. Department of Orthodontics, School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki, Greece;3. Department of Orthodontics and Dentofacial Orthopedics, Dental School, Medical Faculty, University of Bern, Bern, Switzerland; private practice, Corfu, Greece |