Association of Glasgow Prognostic Score with frailty, mortality and adverse health outcomes in older patients with cancer: A prospective cohort study. - van Holstein Y; Trompet S; van Munster BC; van den Berkmortel PJE; van Heemst D; de Glas NA; Slingerland M; Slagboom PE; Holterhues C; Labots G; Mooijaart SP; Portielje JEA; et al. (Journal of geriatric oncology, 2024)