1. Department of Gastroenterological Surgery 1, Hokkaido University Graduate School of Medicine
2. Department of Gastroenterology and Hepatology, Hokkaido University Faculty of Medicine and Graduate School of Medicine
3. Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University
4. Hokkaido University Hospital Institute of Health Science Innovation for Medical Care, Center for Development of Advanced Diagnostics (C-DAD), biological sample management room (Biobank)