@misc{indiciaec50209eebd63,
  title = {Electrocardiography in mitral valvular disease.},
  author = {H R FRASER and R TURNER},
  year = {1955},
  doi = {10.1136/hrt.17.4.459},
  url = {https://pubmed.ncbi.nlm.nih.gov/13269607/},
  note = {Source identifier: 13269607}
}