1. Department of Pharmacology in Dentistry, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
2. Outpatient Geriatric Assessment Unit, Henry Dunant Hospital Center, Athens, Greece
3. Department of Oral Health Sciences, Gerodontology, ELOHA (Equal Lifelong Oral Health for All) research group, Ghent University, Ghent, Belgium
4. Division of Gerodontology and Removable Prosthodontics, University of Geneva, Geneva, Switzerland
5. Department of Internal Medicine and Paediatrics, Ghent University, Ghent, Belgium
6. Department of Prosthodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece