@misc{indiciaeb460e40ad0a4,
  title = {Cluster headache attack due to sildenafil intake.},
  author = {M de L Figuerola and O Bruera and J Lestón and J Ferreiro},
  year = {2006},
  doi = {10.1111/j.1468-2982.2006.01071.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/16674772/},
  note = {Source identifier: 16674772}
}