[1] NIDDKD, Obes 7 Diabet clin Res Sect, Phoenix epidemiol & Clin Res Branch, NIH, Phoenix, AZ USA
[2] Univ Alabama Birmingham, Dept Biostat, Sect Stat Genet, Birmingham, AL 35294 USA
[3] Univ Alabama Birmingham, Clin Nutr Res Ctr, Birmingham, AL 35294 USA
[4] Carl T hayden Vet Affairs Med Ctr, Phoenix, AZ 85012 USA