1. Periodontology Unit and Department of Clinical Research; UCL Eastman Dental Institute; London UK
2. Clinical Oral Research Centre; Institute of Dentistry; Queen Mary University London (QMUL); London UK
3. Department of Biomaterials Science and Turku Clinical Biomaterials Centre - TCBC; Institute of Dentistry; University of Turku; Turku Finland
4. Department of Removable Partial Prosthodontics Rehabilitation; Tokyo Medical and Dental University; Tokyo Japan
5. Library Services; UCL Eastman Dental Institute; London UK
6. Department of Periodontics and Oral Medicine; University of Michigan School of Dentistry; Ann Arbor MI USA