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Circ_0002137 is highly expressed in OS patients. A, qRT‐PCR assay determined relative circ_0002137 expression in OS tissues and adjacent non‐tumour tissues, ***P < .001. B, Relative circ_0002137 expression in OS cell lines (U2OS, 143B, G292 and MG‐63) and normal bone cell hFOB 1.19, ***P < .001. C, qRT‐PCR was analysed for circ_0002137 expression in U2OS and MG‐63 cells transfected with si‐circ0002137, ***P < .001
