1. Department of Digestive Tract and General Surgery, Saitama Medical Center, Saitama Medical University, Japan
2. Division of Translational Research, Research Center for Genomic Medicine, Saitama Medical University, Japan
3. Division of Molecular Diagnosis and Cancer Prevention, Saitama Cancer Center, Saitama, Japan
4. Department of Pathology, Saitama Medical Center, Saitama Medical University, Japan