1. Department of Periodontics UT Health San Antonio San Antonio Texas USA
2. Division of Periodontics, Faculty of Dentistry McGill University Montreal Quebec Canada
3. Private Practice Larisa Greece
4. Pikos Institute Trinity Florida USA
5. Department of Oral Medicine and Periodontology University of Rijeka Rijeka Croatia
6. Department of Periodontology Columbia University College of Dental Medicine New York City New York USA
7. Department of Periodontology and Implant Dentistry, College of Dentistry New York University New York City New York USA