CD274 and B-cell non-Hodgkin lymphoma: Immunocompetent BALB/c mice bearing subcutaneous A20 murine B cell lymphoma/sarcoma tumors in both flanks were injected intratumorally on the left side with either PBS control, backbone virus (VG160), or mVG161 (containing murine versions of IL-12 and PD-L1 blocker) while the tumors on the right side were not treated.