1. Department of Surgery, University of California–San Francisco, San Francisco, California.
2. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California.
3. Preventive and Restorative Dental Sciences, University of California–San Francisco, San Francisco, California.
4. Endocrine Unit, VA Medical Center (111N), Departments of Medicine and Physiology, University of California–San Francisco, San Francisco, California.
5. Department of Oral and Maxillofacial Surgery, University of California–San Francisco, San Francisco, California.
6. Department of Materials, Center for Advanced Structural Ceramics, UK Center for Structural Ceramics, Imperial College, Royal School of Mines, London, United Kingdom.