1. Department of Periodontology; School of Dentistry; National and Kapodistrian University of Athens; Athens Greece
2. Centre for Oral Immunobiology & Regenerative Medicine; Barts and The London School of Medicine and Dentistry; Queen Mary University of London (QMUL); London UK
3. Centre for Clinical Oral Research; Institute of Dentistry, Barts and The London School of Medicine and Dentistry; Queen Mary University of London (QMUL); London UK