1 Department of Orthopaedic Surgery, König-Ludwig-Haus, University of Würzburg, Würzburg, Germany.
2 Department of Biomedical Engineering, University of California at Davis, Davis, California, USA.
3 Department of Mechanical Engineering, University of California at Davis, Davis, California, USA.
4 Department of Orthopaedic Surgery, University of California at Davis, Davis, California, USA.
5 Department of Orthopedic Surgery and Traumatology, Kantonsspital Baselland, Bruderholz, Switzerland.
6 Research Group Michael T. Hirschmann, Regenerative Medicine & Biomechanics, Department of Clinical Research, University of Basel, Basel, Switzerland.