1. Department of Periodontics School of Dentistry Virginia Commonwealth University Richmond Virginia
2. Division of Periodontics Section of Oral, Diagnostic and Rehabilitation Sciences Columbia University College of Dental Medicine NewYork New York USA
3. Departments of Oral Biology, and Microbiology and Immunology Center for Microbiome Research University at Buffalo Buffalo New York USA
4. ETEP (Etiology and Therapy of Periodontal Diseases) Research Group University Complutense Madrid Spain