Cell differentials of bronchial brush biopsies
| Subjects n | Cell count 106 | Epithelials % | Macrophages % | Neutrophils % | Lymphocytes % | Eosinophils % | |
| <3 months | 7 | 0.6±0.2 | 89±4 | 6±3 | 3±1 | 0±0 | 0±0 |
| BOS | 4 | 2.9±0.4 | 79±11 | 5±3 | 15±12 | 1±1 | 0±0 |
| Non-BOS | 8 | 1.6±0.3 | 95±2 | 3±1 | 1±1 | 0±0 | 0±0 |
Data are presented as mean±sem
BOS: bronchiolitis obliterans syndrome