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. 2018 Feb 14;24(6):752–762. doi: 10.3748/wjg.v24.i6.752

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©The Author(s) 2018. Published by Baishideng Publishing Group Inc. All rights reserved.

This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial.

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Amino acid sequence of “a” determinant of the HBs gene (position 110-160) showing no significant escape mutants in common regions (T126S/N, Q129H, D144A, and G145R).