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Expression levels of selected miRNAs in PANC-1 cells, PANC-1 spheroids and exosomes derived from PANC-1 cells and PANC-1 spheroids. The data were normalized to U6 and expressed as mean ± SEM. Here, miRNAs expression in PANC-1 2D cells was used as control (*P < 0.05, **P < 0.01).
