1. Department of Periodontology School of Dentistry National and Kapodistrian University of Athens Athens Greece
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 Faculty of Dentistry Dokuz Eylul University Izmir Turkey
4. Centre for Oral Immunobiology & Regenerative Medicine Institute of Dentistry Bart's & The London School of Dentistry & Medicine Queen Mary University of London (QMUL) London UK