Ma and colleagues reported in a phase II trial using nivolumab in metastatic and/or refractory NPC that 33% of PD-L1-positive patients responded to nivolumab, while only 13% of those with PD-L1 negative tumors responded; however, this did not reach statistical significance.
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Analysis of Epstein-Barr Virus (EBV) and PD-L1 Expression in Nasopharyngeal Carcinoma Patients in a Non-Endemic Region.
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