@misc{indiciae4447115ccea2,
  title = {How many open hearts?},
  author = {J G Scannnell},
  year = {1973},
  doi = {10.1016/s0003-4975(10)65307-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/4690827/},
  note = {Source identifier: 4690827}
}