@misc{indiciaea869a275473c,
  title = {Exercise phonocardiogram: with special reference to Q-II A interval on exercise.},
  author = {M Nakayama},
  year = {1971},
  doi = {10.1253/jcj.35.12\_1551},
  url = {https://pubmed.ncbi.nlm.nih.gov/5172475/},
  note = {Source identifier: 5172475}
}