Fig. 3From: In vitro chondrogenesis of Wharton’s jelly mesenchymal stem cells in hyaluronic acid-based hydrogelsViability staining of cells seeded in HyStem hydrogel. a WJ-MSCs cultured in HyStem hydrogel after 7 days of culture. b WJ-MSCs cultured in HyStem hydrogel after 21 days of culture. c Chondrocytes cultured in HyStem hydrogel after 7 days of culture. d Chondrocytes cultured in HyStem hydrogel after 21 days of culture. Images taken with an Olympus BX60 at magnification 200×; the scale bar is 100 μmBack to article page