@article{10_1093_gerona_56_3_m146,
  title = {Frailty in older adults: evidence for a phenotype},
  author = {Fried LP and Tangen CM and Walston J and Newman AB and Hirsch C and Gottdiener J and Seeman T and Tracy R and Kop WJ and Burke G and McBurnie MA and Cardiovascular Health Study Collaborative Research Group},
  journal = {The Journals of Gerontology Series A: Biological Sciences and Medical Sciences},
  year = {2001},
  doi = {10.1093/gerona/56.3.m146},
  url = {https://doi.org/10.1093/gerona/56.3.m146}
}