1. Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine University of Pisa Pisa Italy
2. Sub‐Unit of Periodontology, Halitosis and Periodontal Medicine University Hospital of Pisa Pisa Italy
3. Unit of Periodontology, Endodontology and Restorative dentistry, Department of Medical Biotechnologies University of Siena Siena Italy
4. Department of Clinical and Experimental Medicine University of Pisa Pisa Italy
5. Department of Medical, Oral and Biotechnological Science University of Chieti Chieti Italy