@misc{indiciae10f250872bea,
  title = {Platelet-derived growth factor: purification and partial characterization.},
  author = {C H Heldin and B Westermark and A Wasteson},
  year = {1979},
  doi = {10.1073/pnas.76.8.3722},
  url = {https://pubmed.ncbi.nlm.nih.gov/291037/},
  note = {Source identifier: 291037}
}