@misc{indiciaef2f25c19b6c2,
  title = {Rationale for combined therapy.},
  author = {E Frei},
  year = {1977},
  doi = {10.1002/1097-0142(197707)40:1+<569::aid-cncr2820400723>3.0.co;2-d},
  url = {https://pubmed.ncbi.nlm.nih.gov/267506/},
  note = {Source identifier: 267506}
}