Figure 2.

Safranin O/Fast Green staining of osteoarthritic (OA) human articular chondrocytes growing on a hydrogel (A–C) or in pellet culture (D–F). (A+D) Passage 2; (B+E) Passage 3; (C+F) Passage 4. Scale bars: 50 µm (A–F), 100 µm (D–F, inserts).