1. Division of Nephrology, Department of Internal Medicine; Taichung Veterans General Hospital; Taichung Taiwan
2. School of Medicine; Chung Shan Medical University; Taiwan
3. School of Medicine; China Medical University; Taichung Taiwan
4. Department of Life Science; Tunghai University; Taichung Taiwan
5. Department of Family Medicine; Cheng Ching General Hospital; Taichung Taiwan