1. Department of Periodontics and Oral Medicine, University of Michigan, Ann Arbor, Michigan.
2. Biologic and Materials Sciences, University of Michigan, Ann Arbor, Michigan.
3. Cell Therapy and Orthopedic Bioengineering Research Center, National Institute on Traumatology and Orthopedics, Rio de Janeiro, Brazil.
4. Department of Urology and Internal Medicine, University of Michigan, Ann Arbor, Michigan.
5. Harvard School of Dental Medicine, Boston, Massachusetts.
6. Stem Cell Biology Program at James Graham Brown Cancer Center, University of Louisville, Louisville, Kentucky.