Bismuth-containing quadruple therapy versus concomitant quadruple therapy as first-line treatment for Helicobacter Pylori infection in an area of high resistance to clarithromycin: A prospective, cross-sectional, comparative, open trial

1. Macías-García, F.
2. Bastón-Rey, I.
3. de la Iglesia-García, D.
4. Calviño-Suárez, C.
5. Nieto-García, L.
6. Domínguez-Muñoz, J.E.