1. Department of Spine Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, PR China
2. Hebei Medical University, Shijiazhuang, PR China
3. ANZAC Research Institute, The University of Sydney, Sydney, Australia
4. Spine Labs, St. George & Sutherland Clinical School, University of New South Wales, Sydney, Australia
5. School of Chemical Engineering, The University of Queensland, Brisbane, Australia
6. Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Australia