1. Department of Rheumatology and Rehabilitation, Poznan University of Medical Sciences, Fredry 10, 61-701 Poznan, Poland
2. Department of Virtual Engineering, Poznan University of Technology, Plac Marii Skłodowskiej-Curie 5, 60-965 Poznan, Poland
3. Department of Biomechanics, University School of Physical Education, Królowej Jadwigi 27/39, 61-871 Poznan, Poland