1. Division of Nephrology, Department of Internal Medicine, Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Chiayi 62247, Taiwan
2. Division of Nephrology, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 97004, Taiwan
3. School of Medicine, Tzu Chi University, Hualien 97004, Taiwan
4. Section of Endocrinology and Metabolism, Department of Medicine, Taipei Veterans General Hospital, Taipei 11217, Taiwan
5. Division of Nephrology, Department of Medicine, Hsin-Jen Hospital, New Taipei City 242009, Taiwan