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Shuai Ma, Hao Liu, Fu-Hai Ma, Yang Li, Peng Jin, Hai-Tao Hu, Wen-Zhe Kang, Wei-Kun Li, Jian-Ping Xiong, Yan-Tao Tian 
World J Gastrointest Oncol 13(3):161-173. Published online Mar 15, 2021. doi: 10.4251/wjgo.v13.i3.161
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