@misc{indiciae4e32fdfc77d7,
  title = {Spacer design.},
  author = {S Cronin},
  year = {1993},
  doi = {10.1016/0140-6736(93)92269-y},
  url = {https://pubmed.ncbi.nlm.nih.gov/7901650/},
  note = {Source identifier: 7901650}
}