1. Department of Mechanical and Aerospace Engineering, Samueli School of Engineering, University of California, Los Angeles, California, USA.
2. Weintraub Center for Reconstructive Biotechnology, School of Dentistry, University of California, Los Angeles, USA.
3. Division of Advanced Prosthodontics, School of Dentistry, University of California, Los Angeles, USA.
4. Department of Oral Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
5. Department of Bioengineering, Samueli School of Engineering, University of California, Los Angeles, USA.
6. Department of Materials Science and Engineering, Samueli School of Engineering, University of California, Los Angeles, USA.