Rocha, Ray Almeida da Silva, Natália de Oliveira Silva, Roberto Satler Cetlin, and Fabiola Dach. “Observational Analysis of 12 Years-Experience With OnabotulinumtoxinA in the Treatment of Chronic Migraine Treated in a Tertiary Headache Center”. Headache Medicine 14, no. Supplement (December 20, 2023): 131. Accessed May 11, 2024. https://headachemedicine.com.br/index.php/hm/article/view/992.