The already-bright hope for Bristol-Myers Squibb Co.'s (BMS) PD-1 checkpoint inhibitor nivolumab in non-small-cell lung cancer (NSCLC) was bolstered by a deal to test the compound with Celldex Therapeutics Inc.'s CD27-targeting varlilumab, on a day that saw another oncology deal in the same space between Incyte Corp. and Medimmune, part of London-based Astrazeneca plc.