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Sections (3 μm) of distal femur from 9-week-old eNOS+/+ (a and c) and eNOS−/− (b and d) mice stained with von Kossa and toluidine blue. Fewer, thinner trabeculae are seen in the femurs of eNOS−/− mice compared to age-matched eNOS+/+ mice. Original magnifications: ×3 (a and b); ×10 (c and d).
