1. Department of Chemical and Biomolecular EngineeringUniversity of California Los Angeles CA 90095 USA
2. College of Life Science and TechnologyBeijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical Technology Beijing 100029 China
3. Department of MicrobiologyImmunology and Molecular GeneticsUniversity of California Los Angeles CA 90095 USA
4. Institute of Medical BiologyChinese Academy of Medical Sciences and Peking Union Medical College Kunming Yunnan 650118 China
5. Department of NeurosurgeryUniversity of California Los Angeles CA 90095 USA
6. Department of Orthopedic SurgeryUniversity of California, San Diego San Diego CA 92093 USA
7. Tianjin Neurological InstituteMOE Key Laboratory of Post‐Neuroinjury Neuro‐Repair and Regeneration in Central Nervous SystemThe General Hospital of Tianjin Medical University Tianjin 300052 China
8. UCLA AIDS Institute Los Angeles CA 90095 USA
9. Division of Hematology–OncologyDavid Geffen School of Medicine at UCLA Los Angeles CA 90095 USA
10. Beijing Institute of Biotechnology Beijing 100071 China