Programmed death-ligand 1 expression discrepancy between primary tumor and metastatic lymph nodes in non-small cell lung cancer - Kian, Waleed; Roisman, Laila C.; Wallach, Nadav; Levitas, Dina; Yakobson, Alexander; Dudnik, Yulia; Peled, Nir; Rouvinov, Keren (Journal of Thoracic Disease; Vol 12, No 8 (August 20, 2020): Journal of Thoracic Disease, 2020)