Researchers constructed three types of CD19-CAR NK-92 cells for the study of B-cell leukemia and lymphoma, including NK-92/63.z cells (1st generation CAR), NK-92/63.28.z cells (2nd CAR, CD28) and NK-92/63.137.z cells (2nd CAR, CD137). Here, TNFRSF9 is linked to lymphoma.