MERTK and systemic inflammatory response syndrome: MerTK+ cells correlated positively with SIRS score (r=0.47; p<0.01), AST (r=0.45; p<0.01), international normalised ratio (r=0.37; p<0.01), heart rate (r=0.36; p<0.05), and negatively with bilirubin (r=−0.4; p<0.05), mean arterial pressure (r=−0.49; p<0.01) and monocyte count (r=−0.47; p<0.01).