@misc{indiciaec4ab81baccc7,
  title = {Is asthma really changing?},
  author = {P P Van Asperen},
  year = {1987},
  doi = {10.1111/j.1440-1754.1987.tb00269.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/3326573/},
  note = {Source identifier: 3326573}
}