@misc{indiciaeacc238bf3ac3,
  title = {Absent aortic valve: a complex anomaly.},
  author = {A E Lin and A J Chin},
  year = {1990},
  doi = {10.1007/bf02238366},
  url = {https://pubmed.ncbi.nlm.nih.gov/2274446/},
  note = {Source identifier: 2274446}
}