1Division of Gastroenterology, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
2Department of Internal Medicine, Kyorin University School of Medicine, Tokyo, Japan
3Department of Gastroenterology, Shanghai Jiao Tong University, Shanghai, China
4Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
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Corresponding author:
Dong Il Park, Tel: +82-2-2001-2059, Fax: +82-2-2001-2049,
Email: diksmc.park@samsung.com
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Received: 12 June 2018 • Revised: 5 September 2018 • Accepted: 6 October 2018