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| Histological subtype | n (%) |
| Non-small cell lung cancer | 254 (84.9) |
| Adenocarcinoma | 116 (38.8) |
| Squamous carcinoma | 92 (30.8) |
| Large cell/poorly differentiated | 46 (15.4) |
| Small cell/neuroendocrine lung cancer | 44 (14.7) |
| Small cell lung cancer | 39 (13.0) |
| Large cell neuroendocrine | 5 (1.7) |
| Other | 1 (0.3) |
| Carcinoid tumour | 1 (0.3) |
