Red flags for secondary headaches: challenges in clinical practice. Headache Medicine, [S. l.], v. 13, n. 4, p. 242–248, 2022. DOI: 10.48208/HeadacheMed.2022.29. Disponível em: https://headachemedicine.com.br/hm/article/view/740. Acesso em: 22 jan. 2026.