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. 2014 Feb 1;3(2):32–37. doi: 10.1302/2046-3758.32.2000187

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©2014 The British Editorial Society of Bone & Joint Surgery

©2014 The British Editorial Society of Bone & Joint Surgery. This is an open-access article distributed under the terms of the Creative Commons Attributions licence, which permits unrestricted use, distribution, and reproduction in any medium, but not for commercial gain, provided the original author and source are credited.

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Figs. 2a - 2d — Figures 2a and 2b – histological images of articular cartilage in the mesenchymal stem cell (MSC)-treated group a) at 16 weeks and b) at 20 weeks post-operatively, showing appropriate thickness, normal distribution of the cells and consistent staining of the cartilage, with the surface layer showing very mild irregularity (haematoxylin and eosin, ×40). Figures 2c and 2d – histological images of articular cartilage in the control group c) at 16 weeks and d) at 20 weeks post-operatively, showing structural disorganisation and severe hypocellularity of chondrocytes.

Figs. 2a - 2d — Figures 2a and 2b – histological images of articular cartilage in the mesenchymal stem cell (MSC)-treated group a) at 16 weeks and b) at 20 weeks post-operatively, showing appropriate thickness, normal distribution of the cells and consistent staining of the cartilage, with the surface layer showing very mild irregularity (haematoxylin and eosin, ×40). Figures 2c and 2d – histological images of articular cartilage in the control group c) at 16 weeks and d) at 20 weeks post-operatively, showing structural disorganisation and severe hypocellularity of chondrocytes.