@misc{indiciae62340d8d9cd9,
  title = {Design-based counting.},
  author = {Heinz Fehrenbach},
  year = {2004},
  doi = {10.1164/ajrccm.169.10.962},
  url = {https://pubmed.ncbi.nlm.nih.gov/15132967/},
  note = {Source identifier: 15132967}
}