Takehiko Yokobori1,2. 1. Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Japan. bori45@gunma-u.ac.jp. 2. Research Program for Omics-Based Medical Science, Division of Integrated Oncology Research, Gunma University Initiative for Advanced Research (GIAR), Maebashi, Japan. bori45@gunma-u.ac.jp.