@misc{indiciae11327adda09d,
  title = {What predicts evolution from episodic to chronic cluster headache?},
  author = {Paola Torelli and Gian Camillo Manzoni},
  year = {2002},
  doi = {10.1007/s11916-002-0026-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/11749880/},
  note = {Source identifier: 11749880}
}