@misc{indiciae6fb7aa7f8179,
  title = {Sleep and depression. A follow-up study.},
  author = {J Mendels and D R Hawkins},
  year = {1967},
  doi = {10.1001/archpsyc.1967.01730230020002},
  url = {https://pubmed.ncbi.nlm.nih.gov/6023943/},
  note = {Source identifier: 6023943}
}