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Fold changes in mRNA levels of BMP4 (A, B) and BMP7 (C, D) in RPE after eyes exposed to defocus for 2 or 48 h via +10 D (A, C) and −10 D (B, D) lenses. Data were expressed as mean ± SEM. GAPDH was housekeeping gene. * p < 0.05, ** p < 0.01, *** p < 0.001.
