CXCL5 and neoplasm: But in their study, CXCL5 staining was scored as the percentage of tumor cells staining positively for CXCL5, while in more studies11, 18, 29, 30, the staining score of CXCL5 for each tissue was calculated by multiplying the intensity of immunostaining score and the percentage of immunoreactive cells score, just like we did.