Ferretti-Rebustini, Renata Eloah de Lucena, et al. “ Validity of the Katz Index to Assess Activities of Daily Living by Informants in Neuropathological Studies ”. Revista Da Escola De Enfermagem Da USP, vol. 49, no. 6, Dec. 2015, pp. 944-50, https://doi.org/10.1590/S0080-623420150000600010.