Pegorari, M. S., and D. M. dos S. Tavares. “Frailty-Associated Factors Among Brazilian Community-Dwelling Elderly People: Longitudinal Study”. São Paulo Medical Journal, vol. 137, no. 5, Oct. 2019, pp. 463-70, https://periodicosapm.emnuvens.com.br/spmj/article/view/964.