1 Center of Experimental Orthopaedics, Saarland University Medical Center, Homburg (Saar) 66421, Germany; Sino Euro Orthopaedics Network, Homburg (Saar), Germany. Electronic address: liang.gao@uni-saarland.de.
2 Sino Euro Orthopaedics Network, Homburg (Saar), Germany; Department of Sports Medicine and Arthroscopic Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, China.
3 Sino Euro Orthopaedics Network, Homburg (Saar), Germany; Trauma Center, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
4 Department of Radiotherapy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
5 Department of Urology, The Second Affiliated Hospital of Anhui Medical University, Hefei, China.