Both KL-6 and SPD correlate negatively with DLCO (% pred) (KL-6: r = −0.587, p < 0.001; SPD: r = −0.417, p = 0.014), while both correlate positively with CT scores (KL-6: r = 0.710, p < 0.001; SPD: r = 0.609, p < 0.001). Here, MUC1 is linked to Platelet storage pool disease.