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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">clinendo</journal-id><journal-title-group><journal-title xml:lang="ru">Клиническая эндоскопия</journal-title><trans-title-group xml:lang="en"><trans-title>Filin’s Clinical endoscopy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2415-7813</issn><publisher><publisher-name>"Global Media technology" Ltd</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">clinendo-496</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>КЛИНИЧЕСКИЕ НАБЛЮДЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL OBSERVATIONS</subject></subj-group></article-categories><title-group><article-title>ДВОЙНОЙ ПРИВРАТНИК: РЕДКОЕ ОСЛОЖНЕНИЕ ЯЗВЕННОЙ БОЛЕЗНИ У ДОЛГОЖИТЕЛЯ</article-title><trans-title-group xml:lang="en"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дегтерев</surname><given-names>Д. Б.</given-names></name></name-alternatives><email xlink:type="simple">ddb@gpb.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Савченков</surname><given-names>Д. К.</given-names></name></name-alternatives><email xlink:type="simple">jadmitrij@ya.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>СПб ГБУЗ «Госпиталь для ветеранов войн»</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>09</day><month>12</month><year>2025</year></pub-date><issue>1</issue><fpage>12</fpage><lpage>14</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Дегтерев Д.Б., Савченков Д.К., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Дегтерев Д.Б., Савченков Д.К.</copyright-holder><copyright-holder xml:lang="en">Дегтерев Д.Б., Савченков Д.К.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://clinendo.elpub.ru/jour/article/view/496">https://clinendo.elpub.ru/jour/article/view/496</self-uri></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Ивашкин В.Т. 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