@article{buchman2009-19546415,
  author  = {Buchman, A. S. and Boyle, P. A. and Wilson, R. S. and Fleischman, D. A. and Leurgans, S. and Bennett, D. A.},
  title   = {{Association between late-life social activity and motor decline in older adults}},
  journal = {Archives of internal medicine},
  year    = {2009},
  doi     = {10.1001/archinternmed.2009.135},
  pmid    = {19546415},
  url     = {https://doi.org/10.1001/archinternmed.2009.135}
}