1. Division of Advanced Prosthodontics, School of Dentistry, University of California, Los Angeles, California 90095, United States
2. Weintraub Center for Reconstructive Biotechnology, School of Dentistry, University of California, Los Angeles, California 90095, United States
3. Division of Diagnostic and Surgical Sciences, School of Dentistry, University of California, Los Angeles, California 90095, United States
4. Department of Bioengineering, University of California, Los Angeles, California 90095, United States