Silva , N.V. da, Santos, M.A.A., Pradela, J. , Dach, F. and Bevilaqua-Grossi, D. 2022. Clinical characteristics of children and adolescents with primary and secondary headaches attended at the tertiary service in Brazil. Headache Medicine. 13, Supplement (Oct. 2022), 9. DOI:https://doi.org/10.48208/HeadacheMed.2022.Supplement.9.