28 biomarkers studied in 259 SSc-ILD, 179 SSc-NO ILD, 172 IPF & 30 healthy controls. Composite biomarker index (w/ SP-D [surfactant prot. D], Ca15-3 [MUC1], & ICAM-1) strongly correlated w/ SSc-ILD (adj OR 12.7); independent of age, sex, smoking, PFTs https://t.co/F0iKFqcZoY https://t.co/Ao25N1DFIx