1. Department of Digestive Tract and General Surgery, Saitama Medical Center, Saitama Medical University, Saitama, Japan
2. Department of Gastrointestinal Tract Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan
3. Diagnosis and Therapeutics of Intractable Disease, Juntendo University Graduate School of Medicine, Tokyo, Japan
4. Division of Molecular Diagnosis and Cancer Prevention, Saitama Cancer Center, Saitama, Japan
5. Department of Urology, Saitama Medical Center, Saitama Medical University, Saitama, Japan
6. Department of Pathology, Saitama Medical Center, Saitama Medical University, Saitama, Japan