Currently, SB and PB are being investigated to deliver CD19, BCMA, SLAMF7, CD33 or CD116 CAR for immunotherapy of hematological malignancies (NCT03389035, NCT04499339, NCT03927261, NCT00968760, NCT01497184, NCT03288493, NCT04960579, jRCT2033210029, ACTRN1261700157938, ChiCTR1800018111). Here, CD19 is linked to hematologic disorder.