1. Department of Integrated Dentistry; Dental Institute; Faculty of Medicine; Jagiellonian University Medical College; Krakow Poland
2. School of Dentistry; University of Siena; Siena Italy
3. Department of Orthodontics; Dental Institute; Faculty of Medicine; Jagiellonian University Medical College; Krakow Poland
4. Department of Oral Kinesiology; Academic Centre for Dentistry Amsterdam (ACTA); University of Amsterdam and Vrije Universiteit Amsterdam; Amsterdam The Netherlands