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Total number of the carbonyl VOCs at concentration in the ranges of lung cancer shown in Table 1 in the breath samples of lung cancer (LC) and benign pulmonary nodule (BN) patients.
| No. of VOCs | 4 | 3 | 2 | 1 | 0 |
| No. of LC patients | 29 | 44 | 17 | 5 | 2 |
| No. of BN patients | 0 | 1 | 5 | 8 | 18 |
