1. Department of Gastroenterology and Hepatology, Iwate Medical University, Morioka, Iwate 020-8505, Japan
2. Ministry of Health and Family Welfare, Government of Bangladesh, Polash, Narshingdi, Bangladesh
3. Division of Molecular Diagnostic Pathology, Department of Pathology, Iwate Medical University, Morioka, Iwate 020-8505, Japan