[1] Cent Hosp Hillerod, Dept Cardiol Nephrol & Endocrinol, Endocrinol Sect, Hillerod, Denmark
[2] Univ Copenhagen, Fac Hlth & Med Sci, Herlev, Denmark
[3] Herlev Univ Hosp, Dept Endocrinol, DK-2730 Herlev, Denmark
[4] Steno Diabet Ctr, DK-2820 Gentofte, Denmark
[5] Univ Aarhus, DK-8000 Aarhus C, Denmark