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Proliferation of MC3T3-E1 cells in different media with initial cell density: (A) 60 × 103 cells/mL; (B) 30 × 103 cells/mL; (C) 15 × 103 cells/mL; (D) 7.5 × 103 cells/mL. Proliferation is represented as mean fluorescence intensity ± SD (n = 4, * p < 0.05; ** p < 0.01). Multiple group comparisons between different media were made daily.
