@misc{indiciae299ec3f175c3,
  title = {Practical problems in collaborative clinical trials.},
  author = {F Ederer},
  year = {1975},
  doi = {10.1093/oxfordjournals.aje.a112138},
  url = {https://pubmed.ncbi.nlm.nih.gov/1098453/},
  note = {Source identifier: 1098453}
}