Study protocol to establish a prospective cohort for the study of phenotypic clusters, progression pathways, and outcomes of frailty and dependence: The CohorFES - Natàlia Garcia-Giralt; Diana Ovejero; Jose Antonio Carnicero Carreño; Anna Ribes; Pedro Abizanda Soler; Jose Antonio Serra Rexach; Francisco José García García; Montse Rabassa; Leocadio Rodriguez Mañas; Àlex Sanchez Pla; Mariam El Assar de la Fuente; Carmen Maria Osuna Del pozo; et al. (PLoS ONE, 2026)