A case of hemorrhagic shock due to massive upper gastrointestinal bleeding: from the differential diagnosis to the correct management. Emergency Care Journal, [S. l.], v. 19, n. 3, 2023. DOI: 10.4081/ecj.2023.11540. Disponível em: https://www.pagepressjournals.org/ecj/article/view/11540. Acesso em: 23 jan. 2026.