1. Clinic of Orthodontics and Pediatric Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
2. Department of Biomaterials, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
3. Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
4. Department of Ear and Oral Diseases, Tampere University Hospital, Tampere, Finland
5. Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland