Serum zinc finger protein 687 (ZNF688), ADP-ribosylation factor GTPase-activating protein 1 (ARFGAP1), CD14, and LBP (lipopolysaccharide-binding protein) have been identified as validated biomarkers for differentiating sarcoidosis from healthy control (23, 57). Here, ARFGAP1 is linked to sarcoidosis.