[1] Univ Michigan, Div Nephrol, Ann Arbor, MI 48109 USA
[2] Dept Vet Affairs Med Ctr, Ann Arbor, MI USA
[3] Birmingham Heartlands Hosp, Birmingham B9 5ST, W Midlands, England
[4] Tokai Univ, Kanagawa 2591100, Japan
[5] Univ Naples Federico II, Naples, Italy
[6] Tokyo Womens Med Univ, Tokyo, Japan
[7] Univ Michigan, Sch Publ Hlth, Dept Biostat, Ann Arbor, MI 48109 USA
[8] Univ Michigan, Kidney Epidemiol & Cost Ctr, Ann Arbor, MI 48109 USA
[9] Univ Renal Res & Educ Assoc, Ann Arbor, MI 48103 USA
[10] Amgen Inc, Thousand Oaks, CA 91320 USA