TABLE 1.

Mean necrosis areas of the groups

Group	Necrosis area, %, mean ± SD	95% CI
Control	26.29±5.47	21.23–31.34
Botulimum toxin	21.57±4.12	17.77–25.38
Cigarette smoke	41.57±8.46	33.74–49.40
Cigarette smoke + botulimum toxin	26.00±5.92	20.53–31.47