1. Department of Orthopaedic Surgery and Traumatology; Kantonsspital Baselland (Bruderholz, Liestal, Laufen); CH-4101 Bruderholz Switzerland
2. Institute of Radiology and Nuclear Medicine; Kantonsspital Baselland; CH-4101 Bruderholz Switzerland
3. Amsler Consulting; CH-4059 Basel Switzerland
4. University of Basel; Basel Switzerland