1. Department of Molecular Biology Sapporo Medical University School of Medicine Sapporo Japan
2. Department of Otolaryngology Sapporo Medical University School of Medicine Sapporo Japan
3. Department of Gastroenterology and Hepatology Sapporo Medical University School of Medicine Sapporo Japan
4. Project for Cancer Epigenomics Cancer Institute Japanese Foundation for Cancer Research Tokyo Japan
5. Department of Surgery Surgical Oncology and Science Sapporo Medical University School of Medicine Sapporo Japan
6. Department of Molecular Diagnostic Pathology School of Medicine Iwate Medical University Morioka Japan