IL6 and pulmonary fibrosis: Based upon these genomic and epigenomic studies identifying potentially novel markers in sarcoidosis and other inflammatory lung disorders (19–25), the current study selected HBEGF, NAMPT, IL-1RA, IL-6, IL-8, Ang-2 as a panel of plasma biomarkers postulated as potentially useful for identifying subjects with progressive sarcoidosis and lung fibrosis.