1 Division of Gerodontology, Dental School, National and Kapodistrian University of Athens, Thivon 2 Goudi, 11527, Athens, Greece. akossion@dent.uoa.gr.
2 Aging Branch, CNR Neuroscience Institute, Via Giustiniani 2, 35127, Padua, Italy.
3 Department of Gerodontology and Removable Prosthodontics, Dental School, University of Geneva, CMU, 1 rue Michel-Servet, 1211, Geneva 4, Switzerland.
4 Department of Internal Medicine (Geriatrics), Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan 185, 9000, Ghent, Belgium.