Aromatase-induced endogenous estrogen promotes tumour metastasis through estrogen receptor-α/matrix metalloproteinase 12 axis activation in castration-resistant prostate cancerLiang, Zhixian; Cao, Jiasong; Tian, Lei; Shen, Yongmei; Yang, Xu; Lin, Qimei; Zhang, Ran; Liu, Haitao; Du, Xiaoling; Shi, Jiandang; Zhang, Ju · Cancer Letters · 2019