CD44 and interstitial lung disease: Furthermore, the expression of Tim-3 was elevated in patients with non-RP-ILD (Figures 4I,J) and RP-ILD (Figures 4O,P) compared to those with no ILD (Figures 4C,D), whereas almost no CD44 expression were observed in patients with no ILD (Figures 4E,F), non-RP-ILD (Figures 4K,L), and RP-ILD (Figures 4Q,R).