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Basic Study
Antonio Madejón, Míriam Romero, Ángela Hernández, Araceli García-Sánchez, Marta Sánchez-Carrillo, Antonio Olveira, Javier García-Samaniego 
World J Gastroenterol 22(11):3165-3174. Published online Mar 21, 2016. doi: 10.3748/wjg.v22.i11.3165
Retrospective Cohort Study
Retrospective Study
Jae Hyun Kim, Seun Ja Park, Jong Hoon Lee, Tae Oh Kim, Hyun Jin Kim, Hyung Wook Kim, Sang Heon Lee, Dong Hoon Baek, Busan Ulsan Gyeongnam Intestinal Study Group Society (BIGS) 
World J Gastroenterol 22(11):3220-3226. Published online Mar 21, 2016. doi: 10.3748/wjg.v22.i11.3220
Observational Study
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