[1] Univ Copenhagen, Hvidovre Hosp, Dept Endocrinol, DK-2650 Hvidovre, Denmark
[2] Univ Copenhagen, Hvidovre Hosp, Dept Clin Biochem, DK-2650 Hvidovre, Denmark
[3] Zealand Pharma AS, Glostrup, Denmark
[4] Univ Copenhagen, Glostrup Hosp, Res Ctr Ageing & Osteoporosis, Dept Geriatr, Glostrup, Denmark