Figure 4From: Chondrogenic differentiation of human subchondral progenitor cells is affected by synovial fluid from donors with osteoarthritis or rheumatoid arthritisType II collagen staining of CSP pellet cultures. Type II collagen staining of CSP pellet cultures at day 28 cultured without TGFB3 but in presence of synovial fluid. The illustration is representative for all other samples, which were taken at day 1, 7, 14 and 21.Back to article page