@misc{indiciae8e5a6b5af6bf,
  title = {The "optional cross-over design" for randomized controlled trials.},
  author = {E Ernst and K L Resch},
  year = {1995},
  doi = {10.1111/j.1472-8206.1995.tb00526.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/8617415/},
  note = {Source identifier: 8617415}
}