CD28 and melanoma: Functional studies comparing NKp30-CD28 CAR or NKp30-CD137 CAR TCR+ and TCRKO T lymphocytes revealed superior anti-tumoral immunity of NKp30-CD28 CAR TCRKO T cells to AML and melanoma cell lines in vitro, and effective control of tumor burden in an NSG melanoma-xenograft mouse model.