Clinical and pathological information of patients (n=54)
| Histological type | n (%) | Smoking status | n (%) | Sex | n (%) |
| Adenocarcinoma | 35 (64.8) | Smoking | 43 (79.6) | Male | 42 (77.8) |
| Squamous cell carcinoma | 16 (29.6) | Non-smoking | 11 (20.4) | Female | 12 (22.2) |
| Large cell carcinoma | 3 (5.6) | ||||