@misc{indiciae726dcfb519c0,
  title = {Advice for travellers.},
  author = {P M Jeffrey and I S Symington},
  year = {1988},
  doi = {10.1136/bmj.297.6643.288-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/3416150/},
  note = {Source identifier: 3416150}
}