1 | Doctoral School, Faculty of Medical Sciences in Katowice, Medical University of Silesia, Katowice, Poland |
2 | Department of General and Vascular Surgery, Angiology and Phlebology, Faculty of Medical Sciences in Katowice, Medical University of Silesia, Katowice, Poland |
3 | Students’ Scientific Surgical Association, Department of General and Vascular Surgery, Angiology and Phlebology, Faculty of Medical Sciences in Katowice, Medical University of Silesia, Katowice, Poland |