| S1P | Sphingosine-1-P |
| BALF | Bronchoalveolar lavage fluid |
| MZ | Marginal zone |
| Ab | Antibody |
| DC | Dendritic cells |
| PP | Peyer’s patches |
| Lp | Lamina propria |
| WT | Wild-type |
| S1P | Sphingosine-1-P |
| BALF | Bronchoalveolar lavage fluid |
| MZ | Marginal zone |
| Ab | Antibody |
| DC | Dendritic cells |
| PP | Peyer’s patches |
| Lp | Lamina propria |
| WT | Wild-type |