[1] Scripps Res Inst, Dept Mol & Expt Med, La Jolla, CA 92037 USA
[2] So Iron Disorders Ctr, Birmingham 35209, W Midlands, England
[3] Kaiser Permanente, Dept Prevent Med, San Diego, CA 92111 USA
[4] Univ Calif Berkeley, Dept Nutr Sci & Toxicol, Berkeley, CA 94720 USA