1. Maxillo-Facial Surgery Ward, EMC Hospital, Pilczycka 144, 54-144 Wrocław, Poland
2. Academy of Applied Sciences, Health Department, Academy of Silesius in Wałbrzych, Zamkowa 4, 58-300 Wałbrzych, Poland
3. Department of Biostructure and Animal Physiology, Wrocław University of Environmental and Life Sciences, Kożuchowska 1, 51-631 Wrocław, Poland
4. Department of Otolaryngology, Head and Neck Surgery, 4th Military Hospital in Wrocław, Weigla 5, 50-981 Wrocław, Poland
5. Private Practise of Maxillo-Facial Surgery, Romualda Mielczarskiego 1, 51-663 Wrocław, Poland
6. Department of Emergency Medicine, Wrocław Medical University, Borowska 213, 50-556 Wrocław, Poland
7. Department of Paediatric Dentistry and Preclinical Dentistry, Wrocław Medical University, Krakowska 26, 50-425 Wrocław, Poland