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Continuous variables were presented as mean with standard deviation or median with range, depending on normality. Categorical variables were presented as frequencies and percentages. Differences were evaluated using the chi-square test or Fisher’s exact test in case of small numbers. P<0.05 was considered statistically significant.
All data were analyzed with Statistical Package for Social Science (SPSS) software version 21.0 (SPSS Inc., Chicago, IL, USA).
Copyright and License information: ©2018 Korean Society of Gastrointestinal Endoscopy
This is an Open Access article 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.
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