Studies of CAR-NK cells already recruiting patients under phase I or phase II can be found for NK-CARs targeting HER2 for glioblastoma/gliosarcoma therapy (NCT03383978), CD19 for R/R B-cell-related malignancies (NCT03056339), the inhibitory ligand PD-L1 for treatment of advanced solid tumors (NCT04050709), or pancreatic cancer in combination with a biological drug N-803 (NCT04390399), which is an IL-15R superagonist [92]. Here, ERBB2 is linked to glioblastoma.