[1] Arbor Res Collaborat Hlth, Ann Arbor, MI USA
[2] Arbor Res Collaborat Hlth, CKDopps, Ann Arbor, MI USA
[3] Deutsch Nierenzentren eV, WiNe Inst, Dusseldorf, Germany
[4] Eickenhof Dialyse, Innere Med Nephrol, Langenhagen, Germany
[5] French Natl Inst Hlth & Med Res, U1018, Villejuif, France
[6] Nephrol Ctr, Villingen Schwenningen, Germany
[7] Univ Hosp Saarland, Internal Med Nephrol & Hypertens, Homburg, Germany