Samples were tinted with hematoxylin-eosin. Patients were excluded if they had had gastrectomies, peptic ulcer complications such as stenosis or bleeding, if they were pregnancy or lactating, if their endoscopic examination showed MALT or gastric cancer, and if they had been treated for H. pylori before.
Fueron excluidos los pacientes con antecedente de gastrectomía, complicaciones por úlcera péptica como estenosis o sangrado, mujeres embarazadas o que estuvieran lactando, hallazgos endoscópicos de linfoma MALT, cáncer gástrico, o que hubieran recibido cualquier tratamiento contra el H. pylori.