1. Department of Oral Surgery, Medical University of Silesia, Plac Akademicki 17, 41-902 Bytom, Poland
2. Department of Conservative Dentistry with Endodontics, Medical University of Silesia, Plac Akademicki 17, 41-902 Bytom, Poland
3. Department of Microbiology and Immunology, Medical University of Silesia, Jordana 19, 41-808 Zabrze, Poland
4. Department of Prosthetic Dentistry, Medical University of Silesia, Plac Akademicki 17, 41-902 Bytom, Poland
5. Department of Orthodontics, Medical University of Silesia, Plac Akademicki 17, 41-902 Bytom, Poland
6. Department of Descriptive and Topographic Anatomy, Medical University of Silesia, Jordana 19, 41-808 Zabrze, Poland
7. Division of Medicine and Dentistry, Department of Oral Surgery, Medical University of Warsaw, Ulica Nowogrodzka 59, 02-006 Warszawa, Poland
8. Department of Prosthetic Dentistry, Faculty of Dentistry, Wrocław Medical University, 50-425 Wrocław, Poland