1. Division of Experimental Anesthesiology, University Hospital Ulm, D‑89081 Ulm, Germany
2. Department of Neurosurgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, P.R. China
3. Department of Orthopaedics, Xuzhou No. 1 People's Hospital, Xuzhou, Jiangsu 221002, P.R. China
4. Department of Biology, School of Life Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
5. Department of Pathology, Anhui Medical University, Hefei, Anhui 230032, P.R. China
6. Department of Haematology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, P.R. China