Alimohammadi, M., Andersson, M., & Rostedt Punga, A. (2013). Correlation of Botulinum Toxin Dose with Neurophysiological Parameters of Efficacy and Safety in the Glabellar Muscles: A Double-blind, Placebo-controlled, Randomized Study. Acta Dermato-Venereologica, 94(1), 32–37. https://doi.org/10.2340/00015555-1647