The Korean Journal of Helicobacter and Upper Gastrointestinal Research is an Open-Access Journal. All articles are distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. REVIEW ISSN 1738-3331, http://dx.doi.org/10.7704/kjhugr.2014.14.4.237 The Korean Journal of Helicobacter and Upper Gastrointestinal Research, 2014;14(4):237-241
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Kim et al. (2014) studied this question.
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