1. Graduate Institute of Clinical Medical Science; China Medical University; Taichung Taiwan
2. Division of Nephrology; China Medical University Hospital; Taichung Taiwan
3. Department of Internal Medicine; College of Medicine; China Medical University; Taichung
4. Biostatistics Center and School of Public Health; China Medical University; Taichung Taiwan
5. Biostatistics Center and School of Public Health; Taipei Medical University; Taipei Taiwan
6. Department of Health Services Administration; China Medical University; Taichung Taiwan
7. Division of Nephrology; Chang Gung Memorial Hospital; Taipei Taiwan
8. Chang Gung University College of Medicine; Taoyuan Taiwan