1. College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P. R. China
2. Department of Spine Surgery, First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian 350005, P. R. China
3. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China