Vitta, Alberto de, Rangel dal Bello Biancon, Guilherme Porfírio Cornélio, Thiago Paulo Frascareli Bento, Nicoly Machado Maciel, and Priscila de Oliveira Perrucini. 2021. “Primary Headache and Factors Associated in University Students: A Cross Sectional Study”. ABCS Health Sciences 46 (March), e021207. https://doi.org/10.7322/abcshs.2020005.1793.