@article{macêdo_carvalho_cavalcanti_freitas_2017,  title={Vitamin B12, bone mineral density and fracture risk in adults: A systematic review},  volume={63},  ISSN={0104-4230},  url={https://doi.org/10.1590/1806-9282.63.09.801},  DOI={10.1590/1806-9282.63.09.801},  number={9},  journal={Revista da Associação Médica Brasileira},  publisher={Associação Médica Brasileira},  author={Macêdo, Luciana Leal Gomes de and Carvalho, Cecilia Maria Resende Gonçalves de and Cavalcanti, Janaína Costa and Freitas, Betania de Jesus e Silva de Almendra},  year={2017},  pages={801–809} }