1. Division of Gastroenterology, Department of Internal Medicine Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation Chiayi Taiwan
2. School of Medicine Tzu Chi University Hualien City Taiwan
3. Graduate Institute of Long‐term Care Tzu Chi University of Science and Technology Hualien City Hualien Taiwan
4. Dalla Lana School of Public Health University of Toronto Toronto Ontario Canada