Isnoldo HS, Antunes R, Utiumi MAT, Marchioro IJM, Kowacs PA, Piovesan EJ. Semiological and epidemiological aspects of difficult-to-treat chronic migraine-resistant form. Headache Med [Internet]. 2024 Aug. 15 [cited 2024 Nov. 23];15(Supplement):92. Available from: https://headachemedicine.com.br/index.php/hm/article/view/1224