1. Ludwig Boltzmann Institute of Osteology at the Hanusch Hospital of WGKK and AUVA Trauma Centre Meidling, First Medical Department, Hanusch Hospital, Austria-Heinrich Collin Staße, 1140 Vienna, Austria
2. Orthopaedic Hospital of Speising, Paediatric Department, Speisinger Staße 109, 1130 Vienna, Austria
3. Department of Neonatology, Danube Hospital, Langobardenstraße 122, 1220 Vienna, Austria
4. Department of Pediatrics, Danube Hospital, Langobardenstraße 122, 1220 Vienna, Austria
5. Department of Radiology, Danube Hospital, Langobardenstraße 122, 1220 Vienna, Austria