1. Division of Oral Biology, Department of General Dentistry, Tufts University School of Dental Medicine, Boston, Massachusetts.
2. School of Stomatology, Shandong University, Jinan, Shandong Province, China.
3. Department of Cellular and Molecular Immunology, Max-Planck Institute of Immunobiology, Freiburg, Germany.
4. Department of Periodontics, Tufts University School of Dental Medicine, Boston, Massachusetts.
5. Department of Orthopaedic Surgery, University of Connecticut, Farmington, Connecticut.