Vitta, A. de ., Biancon, R. dal B. , Cornélio, G.P. , Bento, T.P.F., Maciel, N.M. and Perrucini, P. de O. 2021. Primary headache and factors associated in university students: a cross sectional study. ABCS Health Sciences. 46, (Mar. 2021), e021207. DOI:https://doi.org/10.7322/abcshs.2020005.1793.