NPPB and fibrosis: Patients with NT-proBNP levels ≥300 pg/ml had more fibrosis and pleural effusion according to imaging findings (NT-proBNP <300 pg/ml vs. NT-proBNP ≥300 pg/ml, 52.6% vs. 90.0%, p=0.003; 0.0% vs. 15.0%, p=0.016, respectively) (Table 1).