[1] Amsterdam UMC, Dept Rheumatol, Amsterdam, Netherlands
[2] 424 Mil Gen Hosp, Dept Endocrinol, Thessaloniki, Greece
[3] Univ Southern Denmark, Dept Clin Res, Pathol Res Unit, Campusvej 55, DK-5230 Odense M, Denmark
[4] Odense Univ Hosp, Dept Pathol, Odense, Denmark
[5] Univ Lille, Rheumatol Dept, MABlab ULR 4490, CHU Lille, F-59000 Lille, France
[6] Univ Med Ctr Hamburg Eppendorf, Dept Trauma & Orthopaed Surg, Div Orthopaed, Hamburg, Germany
[7] Czech Acad Sci, Lab Mol Physiol Bone, Inst Physiol, Prague, Czech Republic
[8] Ulm Univ, Inst Comparat Mol Endocrinol CME, Ulm, Germany
[9] Natl & Kapodistrian Univ Athens, Laiko Univ Hosp, Dept Propaedeut & Internal Med 1, Endocrinol Unit, Athens, Greece