@misc{indiciaed1ffd65d0531,
  title = {The "empty heart" phenomenon.},
  author = {A H Wigboldus and J Urzua and J F Viljoen},
  year = {1973},
  url = {https://pubmed.ncbi.nlm.nih.gov/4746355/},
  note = {Source identifier: 4746355}
}