1. Division of Nephrology, Department of Internal Medicine, Kaohsiung Medical University Hospital; Kaohsiung Medical University; Kaohsiung Taiwan
2. Faculty of Renal Care, College of Medicine; Kaohsiung Medical University; Kaohsiung Taiwan
3. Department of Internal Medicine; Kaohsiung Municipal Hsiao-Kang Hospital; Kaohsiung Taiwan
4. Division of Nephrology, Department of Internal Medicine; University of Missouri Health Care; Columbia MO USA