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. Section of Periodontology, Department of Dental Clinical Specialties Complutense University of Madrid Madrid Spain
4. ETEP (Etiology and Therapy of Periodontal and Peri‐Implant Diseases) Research Group, Complutense University of Madrid Madrid Spain
5. Unit of Periodontology, Endodontology and Restorative Dentistry, Department of Medical Biotechnologies University of Siena Siena Italy