1. Department of Bioengineering, University of California, Los Angeles, California.
2. Dental and Craniofacial Research Institute, School of Dentistry, University of California, Los Angeles, California.
3. Division of Advanced Prosthodontics, Biomaterials, and Hospital Dentistry, University of California, Los Angeles, California.
4. Department of Orthopaedics, First Clinical Hospital, Harbin Medical University, Harbin, China.
5. Department of Orthopaedic Surgery, School of Medicine, University of California, Los Angeles, California.