Transplantation of ACE2– mesenchymal stem cells improves the outcome of patients with COVID-19 pneumonia Zikuan Leng1,5#, Rongjia Zhu2#, Wei Hou3#, Yingmei Feng3#, Yanlei Yang4, Qin Han2, Guangliang Shan2, Fanyan Meng1, Dongsheng Du1, Shihua Wang2, Junfen Fan2, Wenjing Wang3, Luchan Deng2, Hongbo … Continue reading Transplantation of ACE2- mesenchymal stem cells improves the outcome of patients with COVID-19 pneumonia