1. Department of Periodontics & Oral Medicine University of Michigan School of Dentistry Ann Arbor MI USA
2. Private Practice Chicago IL USA
3. Research Unit in Periodontology and Periodontal MedicineDepartment of Surgery and Translational Medicine University of Florence Italy
4. Department of Biomedical, Surgical and Dental Sciences Foundation IRCCS Ca’ Granda Polyclinic, University of Milan Milan Italy