1. Periodontology Unit Centre for Host Microbiome Interactions Faculty of Dentistry Oral & Craniofacial Sciences King’s College London London UK
2. Centre for Oral Clinical Research Institute of Dentistry Barts & The London School of Medicine and Dentistry Queen Mary University of London (QMUL) London UK
3. Department of Periodontology Public Dental Service/Malmö University Malmö Sweden