1. Department of Prosthodontics Tufts University School of Dental Medicine Boston Massachusetts USA
2. School of Dentistry Universidad de las Américas (UDLA) Quito Ecuador
3. Department of Oral Medicine, Infection, and Immunity, Division of Periodontology Harvard School of Dental Medicine Boston Massachusetts USA
4. Center for Clinical Research and Evidence Synthesis in Oral TissuE RegeneratION (CRITERION) Boston Massachusetts USA
5. Department of Periodontics and Oral Medicine University of Michigan School of Dentistry Ann Arbor Michigan USA