1. Department of Gastroenterological Surgery; Yokohama City University Graduate School of Medicine; Yokohama Japan
2. Department of Molecular Pharmacology and Neurobiology; Yokohama City University Graduate School of Medicine; 3-9 Fukuura, Kanazawa Ward Yokohama Kanagawa 236-0004 Japan
3. Department of Pathology; Tokyo Women's Medical University; Tokyo Japan
4. Department of Molecular Pathology; Yokohama City University Graduate School of Medicine; Yokohama Japan