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| Pre‐ban mean (SD) (range) | Post‐ban mean (SD) (range) | |
|---|---|---|
| Nicotine (μg/m3) | 28 (15) (3–65) | 0.6 (0.4) (ND–1) |
| Total dust (μg/m3) | 275 (130) (81–506) | 77 (39) (17–170) |
ND, not detected.
