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Morphology (A–G) and percentages (H) of collagen in uncultured samples and in samples cultured for 6 days in control medium alone (α-MEM) or with 1.25, 2.5, 5.0, 10.0, or 20.0 µg/mL α-pinene (AP). a,b: statistically significant differences between treatments. Scale bar = 100 μm.
