EGFR and non-small cell lung carcinoma: IQR: interquartile range; ECOG: Eastern Cooperative Oncology Group; USG: ultrasonogram; EBUS TBNA: endobronchial ultrasound transbronchial needle aspiration; NSCLC: non-small cell lung cancer; NOS: not otherwise specified; EGFR: epidermal growth factor receptor; TKI: tyrosine kinase inhibitor; SCS: Simplified Comorbidity Score, CCI: Charlson Comorbidity Index, ACE-27: Adult Comorbidity Evaluation 27