Withholding or withdrawing of life-sustaining therapy in older adults (>= 80 years) admitted to the intensive care unit

Guidet, B; Flaatten, H; Boumendil, A; Morandi, A; Andersen, Fh; Artigas, A; Bertolini, G; Cecconi, M; Christensen, S; Faraldi, L; Fjolner, J; Jung, C; Marsh, B; Moreno, R; Oeyen, S; Ohman, Ca; Pinto, Bb; Soliman, Iw; Szczeklik, W; Valentin, A; Watson, X; Zafeiridis, T; De Lange, Dw