1. Orthopedic Research Institute, Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China
2. Department of Periodontology, Justus-Liebig-University of Giessen, Germany
3. LIMES Institute, Department of Molecular Brain Physiology and Behavior, University of Bonn, Carl-Troll-Str. 31, 53115 Bonn, Germany
4. National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
5. Department of Orthopaedics and Traumatology, Biomatics Group, University Medical Center of the Johannes Gutenberg University, Langenbeckstr. 1, 55131 Mainz, Germany