IL6 and pulmonary fibrosis: In summary, the current study has demonstrated the diagnostic accuracy of plasma levels of eNAMPT, IL-6, ANG-2, IL-1RA, and HBEGF as a potential panel of biomarkers for sarcoidosis diagnosis and HBEGF, Enampt, and ANG-2 as markers of sarcoidosis progression and lung fibrosis in subjects with complicated sarcoidosis.