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Retrospective Study
David E Flynn, Derek Mao, Stephanie Yerkovich, Robert Franz, Harish Iswariah, Andrew Hughes, Ian Shaw, Diana Tam, Manju Chandrasegaram 
World J Gastrointest Oncol 13(3):185-196. Published online Mar 15, 2021. doi: 10.4251/wjgo.v13.i3.185