@article{liu2018-28660596,
  author  = {Liu, Y. and Wang, Z. and Xiao, W.},
  title   = {{Risk factors for mortality in elderly patients with hip fractures: a meta-analysis of 18 studies}},
  journal = {Aging clinical and experimental research},
  year    = {2018},
  doi     = {10.1007/s40520-017-0789-5},
  pmid    = {28660596},
  url     = {https://doi.org/10.1007/s40520-017-0789-5}
}