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BACKGROUND Longevity of effects and dose equivalence of different botulinum toxin type A (BoNT-A) preparations need to be better clarified because BoNT-A units are manufacturer-specific. These points(More)
IMPORTANCE This article provides new data on a controversial issue, the influence of doses on the diffusion characteristics of 2 botulinum toxins type A. OBJECTIVE To assess the fields of effect of(More)