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| Characteristics | Cases | Characteristics | Cases | ||
|---|---|---|---|---|---|
| Gender | Male | 13 | Tumor size (cm) | <5 | 11 |
| Female | 12 | ≥5 | 14 | ||
| Age (year) | <60 | 15 | Grade | I + II | 15 |
| ≥60 | 10 | III + IV | 10 | ||
| Smoking | Yes | 16 | Stage | I + II | 17 |
| No | 9 | III + IV | 8 | ||
