Expression levels of miR-19b in OC tissues and cells. (A) The expression of miR-19b was compared between OC tissues and adjacent non-tumor tissues. (B) miR-19b expression level was compared between five different OC cell lines (CAOV3, SKOV-3, ES-2, HO-8910, and OVCAR-3) and FTE187 cells. *P<0.05. miR-19b, microRNA-19b; OC, ovarian cancer.