@misc{indiciae2b348db60b3b,
  title = {Scleroderma heart disease.},
  author = {F Wren and M Govindaraj},
  year = {1968},
  doi = {10.1136/bmj.1.5591.578-b},
  url = {https://pubmed.ncbi.nlm.nih.gov/5644172/},
  note = {Source identifier: 5644172}
}