FrotaC. A.; LimaS. V. de A.; CardosoA. O.; de SousaL. F.; SantosF. A. da S.; TrigoM. H. A.; CândidoA. C. S.; RodriquesS. dos S.; de AraujoM. A. P.; PeixotoL. B. Difficulties faced by nurses in performing risk classification in the emergency and emergency service. Electronic Journal Collection Health, v. 13, n. 2, p. e5498, 1 fev. 2021.