@article{lee2010-20159833,
  author  = {Lee, D. H. and Buth, K. J. and Martin, B. J. and Yip, A. M. and Hirsch, G. M.},
  title   = {{Frail patients are at increased risk for mortality and prolonged institutional care after cardiac surgery}},
  journal = {Circulation},
  year    = {2010},
  doi     = {10.1161/circulationaha.108.841437},
  pmid    = {20159833},
  url     = {https://doi.org/10.1161/circulationaha.108.841437}
}