1. Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Geesthacht 21502, Germany
2. Department of Orthopaedics, First Hospital of China Medical University, Shenyang 110001, China
3. Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), University Hospital Schleswig-Holstein (UKSH), Kiel University, Kiel 24118, Germany