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Helicobacter pylori in North and South America before Columbus.
Yamaoka Y, Orito E, Mizokami M, Gutierrez O, Saitou N, Kodama T, Osato MS, Kim JG, Ramirez FC, Mahachai V, Graham DY. Yamaoka Y, et al. FEBS Lett. 2002 Apr 24;517(1-3):180-4. doi: 10.1016/s0014-5793(02)02617-0. FEBS Lett. 2002. PMID: 12062433 Free article.