The contribution of frailty, cognition, activity of daily life and comorbidities on outcome in acutely admitted patients over 80 years in European ICUs: the VIP2 study

Guidet, B; de Lange, Dw; Boumendil, A; Leaver, S; Watson, X; Boulanger, C; Szczeklik, W; Artigas, A; Morandi, A; Andersen, F; Zafeiridis, T; Jung, C; Moreno, R; Walther, S; Oeyen, S; Schefold, Jc; Cecconi, M; Marsh, B; Joannidis, M; Nalapko, Y; Elhadi, M; Fjolner, J; Flaatten, H