@article{mello_engstrom_alves_2014,  title={Health-related and socio-demographic factors associated with frailty in the elderly: a systematic literature review},  volume={30},  ISSN={0102-311X},  url={https://doi.org/10.1590/0102-311X00148213},  DOI={10.1590/0102-311X00148213},  number={6},  journal={Cadernos de Saúde Pública},  publisher={Escola Nacional de Saúde Pública Sergio Arouca, Fundação Oswaldo Cruz},  author={Mello, Amanda de Carvalho and Engstrom, Elyne Montenegro and Alves, Luciana Correia},  year={2014},  month={Jun},  pages={1143–1168} }