Ghorayeb, Joe, Timithy McClellan, and Kelley Crozier. “Atypical Hypersensitivity Reaction to Botulinum Toxin Injection”. Headache Medicine 14, no. 2 (June 30, 2023): 108–111. Accessed November 21, 2024. https://headachemedicine.com.br/index.php/hm/article/view/775.