Pembrolizumab and Pemetrexed for Older Patients With Nonsquamous NSCLC and Programmed Cell Death-Ligand 1 Tumor Proportion Scores of Less Than 50% by Yoshihito Kogure, MD, PhD, Hiroya Hashimoto, PhD, Haruko Daga, MD, PhD, Yasushi Fukuda, MD, Akihiro Bessho, MD, PhD, Tadaaki Yamada, MD, PhD, Yukihiro Toi, MD, Tomoki Kimura, MD, PhD, Hiroshige Yoshioka, MD, PhD, Koichi Azuma, MD, PhD, Naoki Furuya, MD, PhD, Yasutaka Fukui, MD, PhD, Akiko M. Saito, MD, PhD, Nobuyuki Yamamoto, MD, PhD, Hideo Saka, MD, Masashi Kondo, MD, PhD

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