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Retrospective Study
Ryoko Shimizuguchi, Terumi Kamisawa, Yuka Endo, Masataka Kikuyama, Sawako Kuruma, Kazuro Chiba, Taku Tabata, Satomi Koizumi 
World J Gastrointest Pharmacol Ther 9(2):16-21. Published online May 6, 2018. doi: 10.4292/wjgpt.v9.i2.16