Rodrigues, J.M. , Caires, V.V. , Fontoura, K.B.C. , Silva, T.C.S. , Goulart, S.F. , Rocha, C.M. , Teixeira, A.L. and Silva Junior, A.A. da . 2011. Prevalence of headaches in individuals referred from primary care to secondary care. Headache Medicine. 2, 4 (Dec. 2011), 200–203. DOI:https://doi.org/10.48208/HeadacheMed.2011.29.