1. Department of Orthodontics and Temporomandibular Disorders, University of Medical Sciences in Poznań, Poznań, Poland
2. Postgraduate School of Research Methodology, University of Medical Sciences in Poznań, Poznań, Poland
3. Department of Histology, Cytophysiology and Embryology, Academy of Silesia, Katowice, Poland
4. Artmedical Oral Surgery, Toruń, Poland