1. Department of Periodontology and Oral and implant Surgery, Faculty of Medicine University of Liege Liege Belgium
2. Dental Biomaterial Research Unit University of Liege Liege Belgium
3. Department of Periodontology and Oral and Implant Surgery CHU of Liege Liege Belgium
4. Hospital Rothschild Paris France
5. Department of Periodontology Pellegrin Hospital, Bordeaux Private Practice, Odontia Bordeaux France
6. Center for Advanced Oral Imaging Brussels Belgium
7. Harvard School, Boston, MA, USA, of Dental Medicine, Private Practice Paris & Marseille Marseille France