Michael T Hirschmann1,2, Alister Hart3, Johann Henckel3, Patrick Sadoghi4, Romain Seil5,6, Caroline Mouton5. 1. Department of Orthopaedic Surgery and Traumatology, Kantonsspital Baselland (BruderholzLiestalLaufen), 4101, Bruderholz, Switzerland. Michael.Hirschmann@unibas.ch. 2. University of Basel, 4051, Basel, Switzerland. Michael.Hirschmann@unibas.ch. 3. UCL Stanmore Campus, Royal National Orthopaedic Hospital Brockley Hill, Stanmore, UK. 4. Department of Orthopedics and Trauma, Medical University of Graz, Auenbruggerplatz 5, 8036, Graz, Austria. 5. Department of Orthopaedic Surgery, Centre Hospitalier de Luxembourg-Clinique d'Eich, 78 Rue d'Eich, 1460, Luxembourg, Luxembourg. 6. Luxembourg Institute of Health, 78 Rue d'Eich, 1460, Luxembourg, Luxembourg.