1. College of Pharmaceutical and Bioengineering, Shenyang University of Chemical Technology, Shenyang 110142, P. R. China
2. State Key Laboratory of Medical Proteomics, National Chromatographic R. & A. Center, CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
3. University of Chinese Academy of Sciences, Beijing 100049, P. R. China
4. Department of Spine Surgery, First Affiliated Hospital of Dalian Medical University, Dalian 116011, P. R. China