1. Division of Molecular and Diagnostic Pathology; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
2. Division of Gastroenterology and Hepatology; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
3. Department of Gastroenterology; Niigata Medical Center; Niigata Japan
4. Department of Diagnostic Pathology; Saiseikai Niigata Daini Hospital; Niigata Japan