- Correspondence to Professor Young-Suk Lim, Department of Gastroenterology, Asan Medical Center, 88, Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea;
- Received June 25, 2013
- Revised October 4, 2013
- Accepted October 5, 2013
- First published October 25, 2013.
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