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Forest plot hazard ratio (HR) for the correlation between elevated platelet-to-lymphocyte ratio (PLR) and progression-free survival in melanoma. (A) For the total patients' group; (B) Subgroup analysis stratified by sample size; (C) Subgroup analysis stratified by disease status; and (D) Subgroup analysis stratified by cutoff value of PLR. All analyses were performed using a random-effects model.
