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Forest plot of hazard ratios and confidence intervals for overall survival in non-small cell lung cancer patients following immunotherapy. HR, hazard ratio; CI, confidence interval; BMI, body mass index; NLR, neutrophil to lymphocyte ratio; PLR, platelet to lymphocyte ratio; ICIs, immune checkpoint inhibitors; PD-1, programmed cell death-1; PD-L1, programmed cell death-ligand 1.
