1. Division of Gastroenterology, Department of MedicineDalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation Chiayi Taiwan
2. School of MedicineBuddhist Tzu Chi University Hualien Taiwan
3. Graduate Institute of Long‐term CareTzu Chi University of Science and Technology Hualien Taiwan
4. Dalla Lana School of Public HealthUniversity of Toronto Toronto Ontario Canada
5. Veterans Affairs Greater Los Angeles Healthcare SystemSepulveda Ambulatory Care Center North Hill California USA
6. David Geffen School of Medicine at UCLA Los Angeles California USA