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Open-Access Journal
Retrospective Study
Observational Study
Narihiro Shibukawa, Shohei Ouchi, Shuji Wakamatsu, Yuhei Wakahara, Akira Kaneko 
World J Gastrointest Oncol 9(8):327-332. Published online Aug 15, 2017. doi: 10.4251/wjgo.v9.i8.327
Randomized Controlled Trial
Michael Davidson, Ian Chau, David Cunningham, Komel Khabra, Timothy Iveson, Tamas Hickish, Matthew Seymour, Naureen Starling 
World J Gastrointest Oncol 9(8):333-340. Published online Aug 15, 2017. doi: 10.4251/wjgo.v9.i8.333