[1] Univ Colorado, Sch Med, Aurora, CO USA
[2] Univ Colorado, Dept Pediat, Sch Med, Aurora, CO USA
[3] Colorado Sch Publ Hlth, Dept Biostat & Informat, Aurora, CO USA
[4] Barbara Davis Ctr Childhood Diabet, Mail Code A170,1775 Aurora Ct, Aurora, CO 80045 USA