[1] Univ Calif Irvine, Div Nephrol & Hypertens, Orange, CA 92868 USA
[2] Univ Calif Irvine, Dept Med, Orange, CA 92868 USA
[3] Harold Simmons Ctr Kidney Dis Res & Epidemiol, Orange, CA USA
[4] Univ Tennessee, Div Nephrol, Hlth Sci Ctr, Memphis, TN USA
[5] VA Long Beach Hlth Care Syst, Dept Med, Long Beach, CA USA
[6] Inje Univ, Dept Med, Busan, South Korea