Possible absence of Helicobacter pylori in the early stages of duodenal ulceration.
Boulos PB; Botha A; Hobsley M; Holton J; Oshowo AO; Tovey FI; QJM: Monthly Journal Of The Association Of Physicians, 2002, vol. 95, issue 11, p 749, ISSN 14602725. ISBN 14602725.
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