1. Department of Orthodontics, Regenerative and Forensic Dentistry, Faculty of Medicine, Comenius University in Bratislava, 81102 Bratislava, Slovakia
2. Department of Orthodontics and Pediatric Dentistry, Faculty of Dentistry, University of Szeged, H-6720 Szeged, Hungary
3. Department of Stomatology and Maxillofacial Surgery, Faculty of Medicine, Comenius University in Bratislava, 81250 Bratislava, Slovakia