[1] Univ N Carolina, Kidney Ctr, Sch Med, CB 7155, Chapel Hill, NC 27599 USA
[2] Providence Hlth Care, Providence Med Res Ctr, Spokane, WA USA
[3] Univ Washington, Sch Med, Dept Med, Seattle, WA 98195 USA
[4] Univ New Mexico, Dept Internal Med, Div Nephrol, Hlth Sci Ctr, Albuquerque, NM 87131 USA
[5] Univ Arizona, Dept Med, Tucson, AZ USA
[6] Natl Inst Diabet & Digest & Kidney Dis, Phoenix, AZ USA
[7] Univ Michigan, Dept Internal Med, Ann Arbor, MI 48109 USA
[8] Univ Michigan, Dept Mol & Integrat Physiol, Ann Arbor, MI 48109 USA
[9] Univ Minnesota, Dept Pediat, Minneapolis, MN 55455 USA
[10] Univ Minnesota, Dept Med, Box 736 UMHC, Minneapolis, MN 55455 USA
[11] Northwestern Univ, Dept Med, Feinberg Sch Med, Chicago, IL 60611 USA
[12] Univ Colorado, Ctr Global Hlth, Div Endocrinol, Anschutz Med Campus, Aurora, CO USA
[13] Colorado Sch Publ Hlth, Aurora, CO USA
[14] Univ Calif Los Angeles, David Geffen Sch Med, Dept Med, Div Nephrol, Los Angeles, CA 90095 USA
[15] Univ Calif Los Angeles, David Geffen Sch Med, Dept Med, Div Endocrinol, Los Angeles, CA 90095 USA