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Safranin-O staining of neonatal meniscus (A: inner zone, B: outer zone). Tissue in normoxia for T1 (C: inner zone, D: outer zone) and T2 (H: inner zone, I: outer zone) timepoints. Tissue in hypoxia for T1 (E: inner zone, F: outer zone) and T2 (G: inner zone, J: outer zone) timepoints. Scale bar for all images: 50 µm. Arrows: blood vessels; arrowheads: fibro-chondrocytes like cells; thin arrows: fibroblast-like cells; asterisks: extracellular matrix deposition.
