Baseline characteristics of male patients with acute exacerbation of idiopathic pulmonary fibrosis (n=6)
| Age years | 71±6 |
| PaO2/FIO2 | 315±52 |
| LDH U·L−1 | 332±43 |
| KL-6 U·mL−1 | 1808±990 |
| SP-D ng·mL−1 | 318±137 |
| CRP mg ·dL−1 | 9.3±10.9 |
Data are presented as mean±sd. PaO2: arterial oxygen tension; FIO2: inspiratory oxygen fraction; LDH: lactate dehydrogenase; KL-6: Krebs von den Lungen-6; SP-D: surfactant protein-D; CRP: C-reactive protein.