Boone DL, Barreto EF, Parreira FS, Campos HC de, Silva LR e. Warfarin in the treatment of refractory chronic cluster headache: a case report and review in therapeutic options. Headache Med [Internet]. 2022 Jun. 15 [cited 2024 Nov. 23];13(2):133-6. Available from: https://headachemedicine.com.br/index.php/hm/article/view/607