[1] Univ Arkansas Med Sci, Dept Biochem & Mol Biol, Little Rock, AR 72205 USA
[2] Univ Arkansas Med Sci, Dept Internal Med, Little Rock, AR 72205 USA
[3] Acad Hosp Groningen, Ctr Liver Digest & Metab Dis, Groningen, Netherlands
[4] Univ Groningen Hosp, Lab Nutr & Metab, Groningen, Netherlands
[5] Flinders Med Ctr, Dept Clin Pharmacol, Bedford Pk, SA, Australia
[6] Texas Tech Univ, Inst Environm & Human Hlth, Lubbock, TX 79409 USA