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Van Doorn LJ, Figueiredo C, Mégraud F, Pena S, Midolo P, Queiroz DM, Carneiro F, Vanderborght B, Pegado MD, Sanna R, De Boer W, Schneeberger PM, Correa P, Ng EK, Atherton J, Blaser MJ, Quint WG
Geographic distribution of vacA allelic types of Helicobacter pylori. Gastroenterology 116: 823-30, 1999.  [Article] 
 PMID: 10092304.