| NSCLC | Non-small-cell lung cancer |
| EGFR | Epidermal growth factor receptor |
| TKI | Tryrosine kinase inhibitor |
| miRNA | microRNA |
| miR-506-3p | microRNA-506-3p |
| ER | Erlotinib resistance |
| SHH | Sonic Hedgehog |
| EMT | Epithelial–mesenchymal transition |
| rhSHH Pr. | Recombinant SHH protein |
| NGS | Next-generation sequencing |
| PFS | Progression-free survival |
| OS | Overall survival |