[1] Gentofte Univ Hosp, Ctr Diabet Res, Hellerup, Denmark
[2] Zealand Pharma AS, Glostrup, Denmark
[3] Univ Copenhagen, Fac Hlth & Med Sci, Dept Biomed Sci, Copenhagen, Denmark
[4] Univ Amsterdam, Amsterdam Med Ctr, Dept Endocrinol & Metab, Amsterdam, Netherlands
[5] Univ Copenhagen, Bispebjerg Hosp, Dept Clin Pharmacol, Copenhagen, Denmark
[6] Univ Copenhagen, Steno Diabet Ctr Copenhagen, Gentofte, Denmark
[7] Univ Copenhagen, Fac Hlth & Med Sci, Dept Clin Med, Copenhagen, Denmark