1. 1Ludwig Boltzmann Institute of Osteology at Hanusch Hospital of OEGK and AUVA Trauma Centre Meidling, Vienna, Austria
2. 2Diabetes and Metabolism Unit, 1st Med. Department at Hanusch Hospital, Vienna, Austria
3. 3Austrian Social Health Insurance Fund, Österreichische Gesundheitskasse, Eisenstadt, Austria
4. 4Metabolic Bone Diseases Unit, Sigmund Freund University Vienna, School of Medicine, Vienna, Austria