1. Institute of Public Health, College of Medicine National Yang Ming Chiao Tung University Taipei Taiwan
2. Department of Post‐Baccalaureate Medicine, College of Medicine National Chung Hsing University Taichung Taiwan
3. Department of Internal Medicine, Division of Nephrology, Center for Geriatrics and Gerontology Taichung Veterans General Hospital Taichung Taiwan
4. Institute of Clinical Medicine, School of Medicine, College of Medicine National Yang Ming Chiao Tung University Taipei Taiwan
5. Research Center for Geriatrics and Gerontology, College of Medicine National Chung Hsing University Taichung Taiwan
6. Department of Statistics and Information Science Fu Jen Catholic University New Taipei City Taiwan
7. Department of Statistics Tunghai University Taichung Taiwan