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Nogueira GN, Araújo MB de, Passos PRC, Filho LB de SS, Sousa ALGS de, Santos RCD, Banhatto GM de SL, Freitas NQ de, Fiuza PBT, Sousa BHAL de, Gonçalves RF, Isolan GR, Moreira APO, Junior FD de PG. Clinical history of headache, cross-referencing etiological diagnosis and the need for emergency referral, in hospitals in Rio Grande do Sul. Headache Med [Internet]. 2023 Dec. 20 [cited 2024 Nov. 21];14(Supplement):159. Available from: https://headachemedicine.com.br/index.php/hm/article/view/967