- Correspondence to Dr Choong-Kyun Noh, Gastroenterology, Ajou University School of Medicine and Graduate School of Medicine, Suwon 16499, Gyeonggi-do, The Republic of Korea;
- Received February 3, 2021
- Revised February 18, 2021
- Accepted February 19, 2021
- First published March 2, 2021.
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