1. Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, 11527 Athens, Greece
2. Department of Orthodontics, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
3. Department of Orthodontics, Case Western Reserve University, Cleveland, OH 44106, USA
4. Private Practice, 75015 Paris, France
5. Private Practice, 54124 Thessaloniki, Greece