The need for preventive therapy in primary headaches. Headache Medicine, [S. l.], v. 2, n. 2, p. 46–49, 2011. DOI: 10.48208/HeadacheMed.2011.10. Disponível em: https://headachemedicine.com.br/hm/article/view/78. Acesso em: 22 jan. 2026.