SEBALLOS, V.; GONZÁLEZ, D. Clinical case: severe upper gastrointestinal bleeding and covid-19. Revista Cirugía Paraguaya, [S. l.], v. 47, n. 3, p. 35–36, 2023. DOI: 10.18004/sopaci.2023.diciembre.35 . Disponível em: https://cirugia.org.py/index.php/revista/article/view/70. Acesso em: 5 oct. 2024.