1. Department of Cranio-Maxillofacial Surgery, Faculty of Medical Sciences, Medical University of Silesia, 40-027 Katowice, Poland
2. Department of Temporomandibular Disorders, Medical University of Silesia in Katowice; Traugutta sq. 2, 41-800 Zabrze, Poland
3. Department of Biophysics, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, 19 H. Jordan Str., 41-808 Zabrze, Poland