[1] China Med Univ, Grad Inst Biomed Sci, Taichung 404333, Taiwan
[2] Natl Chung Hsing Univ, Coll Med, Dept Postbaccalaureate Med, Taichung 40227, Taiwan
[3] Taichung Vet Gen Hosp, Dept Internal Med, Div Nephrol, Taichung 40705, Taiwan
[4] China Med Univ, Sch Med, Taichung 404333, Taiwan
[5] China Med Univ Hosp, Div Nephrol, Taichung 404333, Taiwan
[6] Brigham & Womens Hosp, Dept Med, Div Gen Internal Med & Primary Care, Boston, MA 02115 USA
[7] Harvard Med Sch, Boston, MA 02115 USA
[8] China Med Univ Hosp, Management Off Hlth Data, Taichung 404333, Taiwan
[9] China Med Univ Hosp, Dept Anesthesiol, Taichung 404333, Taiwan