Country‐specific constancy by age in cagA+ proportion of Helicobacter pylori infections
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E. Kuipers | M. Blaser | N. Bhat | David N. Taylor | D. N. Taylor | G. Perez-Perez | Lian Zhang | W. You | A. Fraser | J. Gaensbauer | A. Fraser | L. Zhang | James T Gaensbauer | Niranjan Bhat