Frailty as the Future Core Business of Public Health: Report of the Activities of the A3 Action Group of the European Innovation Partnership on Active and Healthy Ageing (EIP on AHA) - Liotta, G; Ussai, S; Illario, M; O'Caoimh, R; Cano, A; Holland, C; Roller-Wirnsberger, R; Capanna, A; Grecuccio, C; Ferraro, M; Paradiso, F; Ambrosone, C; et al. (2018)