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Post hoc subgroup analyses of weighted Kaplan–Meier survival curve by clinically specific group after IPTW adjustment. (a) Pembrolizumab first line vs. second line and more; (b) Skin irAEs vs. Non–skin irAEs; (c) Pembrolizumab alone vs. combined chemotherapy; (d) Pembrolizumab fixed dose 100 mg vs. 200 mg.
