@misc{indiciaecb41881397b1,
  title = {Melatonin for cluster headache.},
  author = {M G Smits and J E Nagtegaal},
  year = {2002},
  doi = {10.1046/j.1468-2982.2002.00428.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/12383068/},
  note = {Source identifier: 12383068}
}