@misc{indiciae4a34bdb3b220,
  title = {[A sleeping disorder seldom comes alone].},
  author = {W M de Ruijter and L Bolt and R Groenhuyzen and R Ravelli},
  year = {1997},
  url = {https://pubmed.ncbi.nlm.nih.gov/9542877/},
  note = {Source identifier: 9542877}
}