1. Division of Gastroenterology, Department of Internal Medicine, Aichi Medical University School of Medicine, Nagakute 480‑1195, Japan
2. Department of Pathology, Aichi Medical University School of Medicine, Nagakute 480‑1195, Japan
3. Aichi Medical University School of Medicine, Nagakute 480‑1195, Japan
4. Laboratory of Molecular Biology, National Cancer Institute, Bethesda, MD 20892, USA