The Brazilian Longitudinal Study of Aging (ELSI-Brazil): objectives and design - Lima-Costa, M. Fernanda; Andrade, Fabíola Bof de; Souza Junior, Paulo Roberto Borges de; Neri, Anita Liberalesso; Duarte, Yeda Aparecida de Oliveira; Castro-Costa, Erico; Oliveira, Cesar de (American Journal of Epidemiology, 2018)