@misc{indiciae675e9775ab1f,
  title = {Exact conditional and unconditional sample size for pair-matched studies with binary outcome: a practical guide.},
  author = {P Royston},
  year = {1993},
  doi = {10.1002/sim.4780120709},
  url = {https://pubmed.ncbi.nlm.nih.gov/8511446/},
  note = {Source identifier: 8511446}
}