1. Department of Bioengineering University of California Los Angeles, Los Angeles, California, USA
2. Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering Beihang University, Beijing 100083, People's Republic of China
3. Department of Surgery, School of Medicine University of California Davis, Sacramento, California, USA
4. Institute for Pediatric Regenerative Medicine Shriners Hospitals for Children, Sacramento, California, USA
5. Department of Biomedical Engineering University of California Davis, Davis, California, USA
6. Department of Medicine University of California Los Angeles, Los Angeles, California, USA