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Douglas S Fishman, Bruno P Chumpitazi, Isaac Raijman, Cynthia Man-Wai Tsai, E O’Brian Smith, Mark V Mazziotti, Mark A Gilger 
World J Gastrointest Endosc 8(11):425-432. Published online Jun 10, 2016. doi: 10.4253/wjge.v8.i11.425