@misc{indiciaefc613ef99dcd,
  title = {Ragweed pollen challenges in a controlled environment.},
  author = {V J Fontana and L Indyk and M Zanjanian},
  year = {1974},
  doi = {10.1016/0091-6749(74)90066-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/4415465/},
  note = {Source identifier: 4415465}
}