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Photomicrographs showing L929 mouse fibroblast cultures seeded in different chambers: 1, 3, and 9 days after seeding. “Negative control” means standard cell culture chamber without any modification, “SGF” refers to chambers containing SGFs but without irradiation stimulus, and “SGF + RL” means chambers containing SGFs that received irradiation of RL light (λ = 650 nm). (Scale bar is 100 μm).
