Díaz-Benítez, M. I., Masi, A. L., Adorno, C., & Prieto, I. (2021). Endoscopic characterization of patients with upper gastrointestinal bleeding in the digestive endoscopy department, Hospital Nacional de Itauguá, period 2020. Revista Cirugía Paraguaya, 45(2), 08–12. https://doi.org/10.18004/sopaci.2021.agosto.8