Affiliation: | 1. Department of Hygiene, University School of Physical Education in Poznań, Królowej Jadwigi 27/39, 61-871, Poznań, Poland 2. Department of Physiotherapy, Rheumatology and Rehabilitation, Poznań Medical University, Poznań, Poland 3. Department of Rheumatology and Osteoporosis, Józef Stru? Municipal Hospital, Poznań, Poland
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