Twenty-seven PDX NSCLC mouse models carrying EGFR activating and/or T790M resistance mutations, commonly detected in patients with advanced NSCLC, were evaluated at 3 independent sites….OSI alone and OSI+DC101 combination therapy had stronger antitumor effects than DC101 monotherapy in significantly more models 11 vs 1 and 12 vs 0, respectively. A small but consistent shift in favor of OSI+DC101 vs OSI was observed across most of the models.