MacHado, J.C.

cancer study pylori patient metaplasia gastriti lesion dysplasia helicobacter evidence level eradication pepsinogen pylori eradication serum atrophy diagnosis recommendation endoscopy gastroenterol biopsy follow-up population endoscopic helicobacter pylori infection grade precancerou gastroenterology condition porto portugal progression screening carcinoma surveillance infection group system result society department premalignant helicobacter pylori virchow precancerous lesions statement di mario f classification helicobacter pylori eradication development epithelial dysplasia pathology dinis-ribeiro kuiper trial mucosa aliment pharmacol cohort university factor pathol assessment /lesion extent value guideline serum pepsinogen m ário dinis-ribeiro stomach management meta-analysi ratio precancerous conditions ernst kuipers effect cancer risk corpus cancer patients mucosal epithelial