Frailty prevalence and clinical outcomes according to assessment tools: A systematic review. - Bermejo Boixareu C; Martínez Velilla N; Neira Álvarez M; Abizanda Soler P; Alonso Bouzón C; Casas Herrero A; Castro Rodríguez M; Lisset Toapanta C; Martín-Sánchez FJ; Martínez Peromingo FJ; Martínez Reig M; Pérez Bazán LM; et al. (Revista espanola de geriatria y gerontologia, 2026)