1. Department of Tissue Engineering, China Medical University, Shenyang 110122, China
2. Institute of Regulatory Science for Medical Device, National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
3. State Key Laboratory of Biomembrane and Membrane Biotechnology, School of Life Sciences, Tsinghua University, Beijing 100084, China
4. Department of Neurosurgery, Teikyo University School of Medicine, Tokyo 163-8001, Japan
5. Surgical Bioengineering Laboratory, Department of Surgery, School of Medicine, University of California, Davis, Sacramento, California 95817, United States