[1] Univ Tennessee, Hlth Sci Ctr, Dept Paediat, Memphis, TN 38103 USA
[2] Texas Childrens Hosp, Paediat Renal Serv, Houston, TX 77030 USA
[3] NIDDK, NIH, DKUH, Bethesda, MD 20892 USA
[4] Childrens Hosp & Med Ctr, Div Nephrol, Seattle, WA 98105 USA
[5] Childrens Hosp, Boston, MA 02115 USA
[6] SUNY Stony Brook, Dept Pediat, Childrens Med Ctr, Stony Brook, NY 11794 USA
[7] Univ N Carolina, Div Nephrol & Hypertens, Chapel Hill, NC 27516 USA
[8] Univ Texas, Houston, TX 77030 USA
[9] Childrens Mercy Hosp, Kansas City, MO 64108 USA
[10] Univ Calif Los Angeles, Sch Med, Dept Pediat, Los Angeles, CA 90095 USA
[11] Northwestern Univ, Childrens Mem Hosp, Chicago, IL 60614 USA
[12] NICHHD, Bethesda, MD 20892 USA
[13] Univ Penn, Sch Med, Ctr Clin Epidemiol & Biostat, Philadelphia, PA 19104 USA
[14] Montefiore Med Ctr, Dept Pediat, Bronx, NY 10467 USA
[15] Yale Univ, Sch Med, Dept Pediat, New Haven, CT 06520 USA