Onset, longevity, and patient satisfaction with incobotulinumtoxinA for the treatment of glabellar frown lines: a single-arm, prospective clinical study.

At visit 4 (day 14 ± 2), there was a trend for patients to agree less strongly with the statements than they did at visit 1 (day 0), suggesting that at this time point after treatment patients were happier with their appearance, though these results did not reach statistical significance.

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