1 | Department of Anatomy, Faculty of Health Sciences in Katowice, Medical University of Silesia in Katowice, Poland |
2 | Institute of Non-Ferrous Metals, Gliwice |
3 | Solveere Sp. z o.o., Ogrodzieniec |
4 | Department of Laryngology, Faculty of Medical Sciences in Katowice, Medical University of Silesia in Katowice, Poland |