@misc{indiciae2f354bcd04f9,
  title = {Combined valve procedures.},
  author = {S J Phillips and R H Zeff and C Kontahworn},
  year = {1977},
  doi = {10.1016/s0003-4975(10)63464-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/304339/},
  note = {Source identifier: 304339}
}