@misc{indiciaef96f09b56314,
  title = {After fifty, what?},
  author = {R H Betts},
  year = {1970},
  doi = {10.1016/s0003-4975(10)65378-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/5476235/},
  note = {Source identifier: 5476235}
}