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Seung Han Kim, Bora Keum, Hyuk Soon Choi, Eun Sun Kim, Yeon Seok Seo, Yoon Tae Jeen, Hong Sik Lee, Hoon Jai Chun, Soon Ho Um, Chang Duck Kim, Sungsoo Park 
World J Gastroenterol 24(40):4578-4585. Published online Oct 28, 2018. doi: 10.3748/wjg.v24.i40.4578
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