MATTOS, L. C. de; CINTRA, J. R.; SANCHES, F. E.; SILVA, R. de C. M. A. da; RUIZ, M. A.; MOREIRA, H. W. ABO, Lewis, secretor and non-secretor phenotypes in patients infected or uninfected by the Helicobacter pylori bacillus. São Paulo Medical Journal, [S. l.], v. 120, n. 2, p. 55–58, 2002. Disponível em: https://periodicosapm.emnuvens.com.br/spmj/article/view/2677. Acesso em: 16 oct. 2025.