1. Department of Orthodontics, Medical University of Białystok, ul. Waszyngtona 15A, 15-274 Białystok, Poland
2. Faculty of Health Sciences, San Antonio de Murcia Catholic University (UCAM), 30107 Murcia, Spain
3. Prosthodontic and Occlusion Unit, Department of Stomatology, Faculty of Medicine and Dentistry, University of Valencia, 46010 Valencia, Spain