1. Departments of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
2. Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
3. Department of Biological Chemistry, School of Medicine, University of Michigan, Ann Arbor, MI, USA
4. Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA