1. MIRA Institute for Biomedical Technology and Technical Medicine; Department of Biomaterials Science and Technology; University of Twente Enschede; The Netherlands
2. AO Research Institute; Davos Switzerland
3. Institute of Orthopaedics; Chinese People's Liberation Army General Hospital (301 Military Hospital); Beijing People's Republic of China
4. University of Groningen, University Medical Center Groningen, W.J. Kolff Institute; Department of Biomedical Engineering; The Netherlands