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Retrospective Study
Yukihisa Takayama, Akihiro Nishie, Yoshiki Asayama, Kousei Ishigami, Daisuke Kakihara, Yasuhiro Ushijima, Nobuhiro Fujita, Ken Shirabe, Atsushi Takemura, Hiroshi Honda 
World J Hepatol 9(14):657-666. Published online May 18, 2017. doi: 10.4254/wjh.v9.i14.657
Evidence-Based Medicine
Systematic Reveiws