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), p. 9. doi: 10.48208/HeadacheMed.2022.Supplement.9.