@misc{indiciae93231e003e7b,
  title = {Studies on a cephalalgia extinction test.},
  author = {G Nattero and L Gastaldi and V Gai},
  year = {1971},
  doi = {10.1111/j.1365-2524.1971.hed1004150.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/5101172/},
  note = {Source identifier: 5101172}
}