@misc{indiciae20da72010e3f,
  title = {[Cluster headache: misjudged because unknown].},
  author = {J Ridderikhoff and P J Koudstaal},
  year = {1997},
  url = {https://pubmed.ncbi.nlm.nih.gov/9132602/},
  note = {Source identifier: 9132602}
}