CXCL8 and ventilator-associated pneumonia: The Bioscore model—incorporating seven biomarkers from BAL fluid and serum, such as the TREM-1 BALF/blood ratio, sTREM-1, IL-8, IL-1β, CRP, and IL-6—correctly identified 88.9% of VAP cases and 100% of non-VAP cases [59].