[1] Steno Diabet Ctr, DK-2820 Gentofte, Denmark
[2] Glostrup Cty Hosp, Dept Med, Glostrup, Denmark
[3] Hvidovre Univ Hosp, Clin Res Ctr, Hvidovre, Denmark
[4] Hvidovre Univ Hosp, Dept Biochem, Hvidovre, Denmark
[5] Aarhus Univ, DK-8000 Aarhus C, Denmark