Boone, D. L., Barreto, E. F., Parreira, F. S., Campos, H. C. de . and Silva, L. R. e . (2022) “Warfarin in the treatment of refractory chronic cluster headache: a case report and review in therapeutic options”, Headache Medicine, 13(2), pp. 133–136. doi: 10.48208/HeadacheMed.2022.9.