Magnesium ion serum profile in chronic migraine: comparative study between treated and non-treated patients. Headache Medicine, [S. l.], v. 3, n. 1, p. 21–25, 2012. DOI: 10.48208/HeadacheMed.2012.4. Disponível em: https://headachemedicine.com.br/hm/article/view/310. Acesso em: 22 jan. 2026.