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The study was conducted in accordance with The Code of Ethics of the World Medical Association (Declaration of Helsinki). All patients written informed consent to take gastric antral biopsy specimens during diagnostic upper gastrointestinal endoscopy. The Ethics Committee of Qingdao Municipal Hospital issued ethical approvals (permit number 2022‐002).
Copyright and License information: ©2024 The Authors. published by John Wiley & Sons Ltd on behalf of Federation of European Biochemical Societies.
This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
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