CHÁVEZ BARRIGA, John. Frequency of Helicobacter pylori infection in patients attended at Centro de Salud Ocaña, Ayacucho. Revista Médica Herediana, [S. l.], v. 31, n. 1, p. 23–29, 2020. DOI: 10.20453/rmh.v31i1.3724. Disponível em: https://revistas.upch.edu.pe/index.php/RMH/article/view/3724. Acesso em: 30 apr. 2024.