Akbay, E. A., S. Koyama, J. Carretero, A. Altabef, J. H. Tchaicha, C. L. Christensen, O. R. Mikse, et al. 2013. “Activation of the PD-1 Pathway Contributes to Immune Escape in EGFR-Driven Lung Tumors.” Cancer Discovery 3 (12) (September 27): 1355–1363. doi:10.1158/2159-8290.cd-13-0310.