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(A) Tumour volume was measure at the indicated time points (day 7, 11, 15, 19, 23, and 27). (B) At 27 days post cell implantation, tumours were excised and weighted. (C) Circ-PVT1 expression level was detected by RT-qPCR assay in xenograft tumors; *P < 0.05.
