1. Department of Rehabilitation, Faculty of Health Sciences in Katowice, Medical University of Silesia, Katowice, Poland
2. Department of General and Vascular Surgery, Angiology and Phlebology, Medical University of Silesia in Katowice, Poland / Department of Physiotherapy, School of Health Science, Medical University of Silesia, Katowice, Poland
3. Department of General and Vascular Surgery, Angiology and Phlebology, Upper Silesian Medical Centre in Katowice, Ochojec, Poland
4. Hospital Megrez Limited Liability Company, Tychy, Poland
5. MIDMED Limited Liability Company, Katowice, Poland