1 Experimental Orthopaedics, Centre for Medical Biotechnology (ZMB), University of Regensburg, Bavaria, Germany.
2 Experimental Orthopaedics, Centre for Medical Biotechnology (ZMB), University of Regensburg, Bavaria, Germany. susanne.graessel@klinik.uni-regensburg.de.
3 Department of Orthopaedic Surgery, University of Regensburg, Bavaria, Germany. susanne.graessel@klinik.uni-regensburg.de.