FIRAT, B. T.; GULEN, M.; SATAR, S.; FIRAT, A.; ACEHAN, S.; ISIKBER, C.; KAYA, A.; SAHIN, G. K.; AKOGLU, H. Perfusion index: Could this be a new triage tool for upper gastrointestinal system bleeding in the emergency department? A prospective cohort study. São Paulo Medical Journal, [S. l.], v. 139, n. 6, p. 583–590, 2021. Disponível em: https://periodicosapm.emnuvens.com.br/spmj/article/view/551. Acesso em: 10 mar. 2025.