Association between Clinical Frailty Scale (CFS) and clinical presentation and outcomes in older inpatients with COVID-19. - Martí-Pastor A; Moreno-Perez O; Lobato-Martínez E; Valero-Sempere F; Amo-Lozano A; Martínez-García MÁ; Merino E; Sanchez-Martinez R; Ramos-Rincon JM (BMC geriatrics, 2023)