1. Graduate Periodontology; University of Granada and Private Periodontal Practice; Málaga Spain
2. University College London (UCL) Eastman Dental Institute; London UK
3. PHL London; Public Health England; London UK
4. Department of Microbial Diseases; Eastman Dental Institute and Hospital; University College London; London UK
5. Academic Unit of Restorative Dentistry; University of Sheffield; Sheffield UK
6. European Reserach Group on Periodontology (ERGOperio); Genova Italy