[1] Aarhus Univ, Dept Clin Med, Palle Juul Jensens Blvd 82, DK-8200 Aarhus, Denmark
[2] Reg Hosp Silkeborg, Diagnost Ctr, Falkevej 1A, DK-8600 Silkeborg, Denmark
[3] Aarhus Univ Hosp, Dept Endocrinol & Internal Med, Palle Juul Jensens Blvd 99, DK-8200 Aarhus N, Denmark
[4] Danish Diabet Acad, Sondre Blvd 29, DK-5000 Odense, Denmark
[5] Nordsjaellands Hosp, Dept Cardiol Nephrol & Endocrinol, Dyrehavevej 29, DK-3400 Hillerod, Denmark
[6] Reg Hosp Silkeborg, Elect Surg Ctr, Sleep Disorders Clin, Falkevej 1A, DK-8600 Silkeborg, Denmark
[7] Univ Copenhagen, Dept Clin Med, Fac Hlth & Med Sci, Blegdamsvej 3B, DK-2200 Copenhagen N, Denmark
[8] Steno Diabet Ctr Zealand, Birkevaenget 3,3 Sal, DK-4300 Holbaek, Denmark