@article{ma2018-30272104,
  author  = {Ma, L. and Sun, F. and Tang, Z.},
  title   = {{Social Frailty Is Associated with Physical Functioning, Cognition, and Depression, and Predicts Mortality}},
  journal = {The journal of nutrition, health \& aging},
  year    = {2018},
  doi     = {10.1007/s12603-018-1054-0},
  pmid    = {30272104},
  url     = {https://doi.org/10.1007/s12603-018-1054-0}
}