MUC1 and incontinentia pigmenti: The variation of KL-6 during the summer (Smax/Smin) in patients with House-HP was significantly greater than Bird-HP (P = 0.003) and showed a tendency to be greater than CPFE (P = 0.004), CVD-IP (P = 0.021), IPF (P = 0.033), or NSIP (P = 0.037) (Table 1, Figure 1C).