Sandoval-Insausti, H. Blanco-Rojo, R. Graciani, A. López-García, E. Moreno-Franco, B. Laclaustra, M. Donat-Vargas, C. Ordovás, J.M. Rodríguez-Artalejo, F. Guallar-Castillón, P. Ultra-processed Food Consumption and Incident Frailty: A Prospective Cohort Study of Older Adults J. gerontol., Ser. A, biol. sci. med. sci. 10.1093/gerona/glz140 2020 2020