1. Ludwig Boltzmann Institute of Osteology at Hanusch Hospital of OEGK and AUVA, Trauma Centre Meidling, 1st Medical Department Hanusch Hospital, 1140 Vienna, Austria
2. Vienna Bone and Growth Center, 1130 Vienna, Austria
3. Metabolic Bone Diseases Unit, School of Medicine, Sigmund Freud University Vienna, 1020 Vienna, Austria
4. Optimal Essen e.U, 1040 Vienna, Austria