OA: osteoarthritis; MSC: mesenchymal stem cells; CFU-F: cultures of colony-forming cells; VAS: visual analogue scale; KOOS: knee injury and osteoarthritis outcome score; ADL: function in daily living; sport/rec.: function in sport and recreation; QOL: quality of life; δ: difference from baseline. MCII: minimal clinically important improvement; with respect to basal level.
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