@misc{indiciae0a9a4573e0b2,
  title = {[Sleeping disorders rarely come singly].},
  author = {A W dé Weerd and M M Thijssen and M M Verhelst},
  year = {1997},
  url = {https://pubmed.ncbi.nlm.nih.gov/9190519/},
  note = {Source identifier: 9190519}
}