[1
]
Department of Orthodontics and Dentofacial Orthopedics, 251 Hellenic Air Force and
VA General Hospital, Athens, Greece.
[2
]
Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Switzerland.
[3
]
Department of Orthodontics, Faculty of Dentistry, School of Health Sciences, Aristotle
University of Thessaloniki, Greece.