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Knee joint histopathology: (A) Hematoxylin and eosin (H&E) and (B) Safranin-O staining. The Safranin-O interpretation: Cartilage (orange to red), cytoplasm (bluish or grey-green) and nuclei (black).
Abbreviations: OA, osteoarthritis; VP, Vitellaria paradoxa.
