Observational analysis of 12 years-experience with OnabotulinumtoxinA in the treatment of chronic migraine treated in a tertiary headache center. Headache Medicine, [S. l.], v. 14, n. Supplement, p. 131, 2023. Disponível em: https://headachemedicine.com.br/hm/article/view/992. Acesso em: 22 jan. 2026.