Vetta F, Locorotondo G, Vetta G, Mignano M, Bracchitta S. Prognostic impact of frailty in elderly cardiac surgery patients. Monaldi Arch Chest Dis [Internet]. 2017 Jul. 18 [cited 2024 Apr. 25];87(2). Available from: https://www.monaldi-archives.org/macd/article/view/855