Administration of umbilical cord mesenchymal stem cells in patients with severe COVID-19 pneumonia Published on 2020-07-112022-11-01 Journal: Critical Care [키워드] Patient Severe COVID-19 pneumonia stem cell umbilical [저자] Zhinian Guo, Yunlong Chen, Xiaoyu Luo, Xiaolong He, Yong Zhang, Jiang Wang [Category] COVID-19, PMC URL [DOI] 10.1186/s13054-020-03142-8 [Article Type] Research Letter [Source] PMC All Keywords 【제목키워드】 Severe COVID-19 pneumonia, Patient, stem cell, umbilical,