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The American Journal of Gastroenterology|September 28, 2000
CagA-positive strains of Helicobacter pylori may protect against Barrett's esophagusM F Vaezi, G W Falk, R M Peek, et al.Gastroenterology|July 3, 1998
The seroprevalence of cagA-positive Helicobacter pylori strains in the spectrum of gastroesophageal reflux diseaseJ J Vicari, R M Peek, G W Falk, et al.Pageof 2