@misc{indiciaec659658a249b,
  title = {Do negative air ions affect human mood and performance?},
  author = {A Hedge and M D Collis},
  year = {1987},
  doi = {10.1093/annhyg/31.3.285},
  url = {https://pubmed.ncbi.nlm.nih.gov/3426028/},
  note = {Source identifier: 3426028}
}