EpCAM deficiency causes the premature ageing of intestinal stem cells via EGFR/SP1/mTORC1 pathway - Keying Li; Changlong Xu; Lulu Liu; Yunjuan Wang; Jun Chen; Chunyuan Li; Zitong Peng; Xiaoqian Li; Gang Chang; Zili Lei; Yanhong Yang (Clinical and Translational Medicine)