1. Department of Molecular Diagnostic Pathology, School of Medicine; Iwate Medical University; 19-1, Uchimaru Morioka 020-8505 Japan
2. Department of Surgery, Tohoku University Tohoku Graduate School of Medicine; 1-1, Aoba-ku Sendai 980-8574 Japan
3. Department of Pharmacodynamics and Molecular Genetics, School of Pharmacy; Iwate Medical University; 1-1, Yahaba Morioka 028-3694 Japan
4. Department of Surgery; Iwate Medical University; 19-1, Uchimaru Morioka 020-8505 Japan
5. Division of Gastroenterology, Department of Internal Medicine; 19-1, Uchimaru Morioka 020-8505 Japan
6. Department of Molecular Biology; Sapporo Medical University School of Medicine; S1 W17, Chuo-ku Sapporo 060-8556 Japan