High Cytotoxic Efficiency of Lentivirally and Alpharetrovirally Engineered CD19-Specific Chimeric Antigen Receptor Natural Killer Cells Against Acute Lymphoblastic Leukemia. - Müller S; Bexte T; Gebel V; Kalensee F; Stolzenberg E; Hartmann J; Koehl U; Schambach A; Wels WS; Modlich U; Ullrich E (Frontiers in immunology, 2020)