Helicobacter pylori cagA and vacA Genotypes as Predictors of Progression of Gastric Preneoplastic Lesions: A Long-Term Follow-Up in a High-Risk Area in Spain

Helicobacter pylori cagA and vacA Genotypes as Predictors of Progression of Gastric Preneoplastic Lesions: A Long-Term Follow-Up in a High-Risk Area in Spain