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 (Oct. 2022), 39. DOI:https://doi.org/10.48208/HeadacheMed.2022.Supplement.39.