1. Department of Physiotherapy, Wroclaw Medical University, T. Chałubińskiego 3, 50-556 Wrocław, Poland
2. Department of Rheumatology and Internal Medicine, Wroclaw Medical University, Borowska Street 213, 50-556 Wroclaw, Poland
3. Biomechanics Department, Wroclaw University of Health and Sport Sciences, Paderewskiego 35, 51-612 Wrocław, Poland
4. Department of Rheumatology and Internal Medicine, University Hospital, Borowska Street 213, 50-556 Wroclaw, Poland
5. Department of Medicine, Albert Einstein College of Medicine, 1300 Morris Park Ave., New York, NY 10461, USA
6. Clinical Department of Nephrology and Transplantation Medicine, Wroclaw Medical University, Borowska Street 213, 50-556 Wroclaw, Poland