Circ_ASPH promotes cholangiocarcinoma growth and metastasis through the miR‐581/ATP‐binding cassette transporter G1 signaling pathway. Issue 10 (31st July 2020) - Xu, Yi; Kang, Pengcheng; Leng, Kaiming; Yao, Yue; Liao, Guanqun; Han, Yi; Shi, Guangjun; Zhong, Xiangyu; Cui, Yunfu