Frailty in older adults with amnestic mild cognitive impairment as a result of Alzheimer's disease: a comparison of two models of frailty characterization - Cezar, Natália Oiring de Castro; Izbicki, Rafael; Cardoso, Diego; Almeida, Jouce Gabriela de; Valiengo, Leandro da Costa Lane; Camargo, Marina von Zuben de Arruda; Forlenza, Orestes Vicente; Yassuda, Monica Sanches; Aprahamian, Ivan (Geriatrics & Gerontology International, 2017)