Table 2.
The permille of tobacco-related topic terms associated with other malignant neoplasm.
| Topic term | 1996/1997 | 2008 | 2016 |
| Tobacco | 1.5 | 0.0 | 0.0 |
| Smoking | 0.8 | 0.0 | 0.0 |
| Cigarette | 0.7 | 0.0 | 0.0 |
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