Figure 1
From: Altered spontaneous calcium signaling of in situ chondrocytes in human osteoarthritic cartilage
Histological feature of ICRS 1–3 grades articular cartilage samples collected from patients undergoing knee arthroscopic surgery. From top to bottom, the severity of collected articular cartilage samples was evaluated by hematoxylin and eosin (H&E), alcian blue, and sirius red, respectively (n = 3–4 for each ICRS grade).
