Association of cognitive function with frailty, nutritional status, and quality of life in older adults with mild cognitive impairment - María del Mar Carcelén-Fraile; Anabel Melguizo-Garín; Aday Infante-Guedes; Raquel Medina-Ramírez; Sandra Denche-Gil; Agustín Aibar-Almazán; Yolanda Castellote-Caballero; María del Carmen Carcelén-Fraile (PLoS ONE, 2025)