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Photomicrographs of sagittal sections processed from the osteochondral defect in left femur of New Zealand White rabbits. The stained sections showed progressively milder degree of blue color (collagen fiber) with time intervals, an indication of better repair in group C followed by groups B and A. Group A (control), group B (bone marrow mononuclear cells), group C (bone marrow mononuclear cells + insulin like growth factor-1) (Masson’s trichrome stain, 200×).
