ACE2 in tumor cells and tumor vasculature: Negligible intercellular transfer from cancer cells into endothelial cells oleh Liu Zhi-Jie, Mei Yan, Lu Jiang-Li, Lu Jia-Bin, Cao Yun, Cai Mu-Yan, Zheng Li-Sheng, Wang Ming-Dian, Peng Li-Xia, Li Yang, Huang Bi-Jun, Yun Jin-Ping, Qian Chao-Nan