1. Department of Orthopedics and Traumatology, Medical University of Graz, Graz, Austria
2. LK Baden-Mödling-Hainburg, Department of Orthopedic Surgery and Traumatology, Waltersdorferstraße 75, A-2500 Baden, Austria
3. Danube University Krems, Faculty of Health and Medicine, Department for Health Sciences and Biomedicine, Center for Medical Specialisations, Dr. Karl-Dorrek-Str. 30, A-3500 Krems, Austria