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Hiromichi Yamane, Minoru Matsubara, Shigeki Umemura, Toshimitsu Suwaki, Haruhito Kamei, Nagio Takigawa, Katsuyuki Kiura, Mitsune Tanimoto 
World J Gastrointest Oncol 3(11):165-168. Published online Nov 15, 2011. doi: 10.4251/wjgo.v3.i11.165