Parietal cell hyperactivity is not due to Helicobacter pylori infection in patients with duodenal ulcer

1. Valenzuela, M.
2. Martín-Ruiz, J.L.
3. Caballero-Plasencia, A.M.
4. Alvarez-Cienfuegos, I.
5. Nogales, F.F.
6. Guilarte, J.
7. Peña, J.F.