@misc{indiciae9ef37ebb2632,
  title = {Propanalol in Fallot's tetralogy.},
  author = {C C Varkey},
  year = {1973},
  doi = {10.1007/bf02820138},
  url = {https://pubmed.ncbi.nlm.nih.gov/4769813/},
  note = {Source identifier: 4769813}
}