Andrade , J. R. de, Santana , C. C. de L., Souza, B. F. N. de, Cruz, F. . and Valença, M. M. (2022) “Headache frequency among 71,267 admissions to an adult medical emergency in the city of Recife in 2021”, Headache Medicine, 13(Supplement), p. 39. doi: 10.48208/HeadacheMed.2022.Supplement.39.