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Low physiologic oxygen conditions favor the expansion of choroidal melanocytes. A: Typical morphology and melanin content of choroidal melanocytes grown under 21% or 3% O2 (P2, 1-month exposure). B: Typical morphology of uveal melanoma (UM) cells grown under 21% or 3% O2 (P2, 1-month exposure). Scale bars, 50 µm.
