1. Professor and Clinic Director, Clinic of General, Special care, & Geriatric Dentistry, Centre of Dental Medicine, University of Zurich, Switzerland
2. Professor, Head of Division of Gerodontology, School of Dental Medicine, University of Bern, Switzerland
3. Professor, Department of Prevention and Oral Rehabilitation, School of Dentistry, Federal University of Goias, Goainia, Brazil
4. Senior Lecturer/Consultant in Restorative Dentistry, Centre for Public Health, Queen’s University Belfast