@misc{indiciaebfa72f1543e4,
  title = {Strange trips.},
  author = {M Ahmad and J A Whitehead},
  year = {1969},
  doi = {10.1016/s0140-6736(69)92515-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4187223/},
  note = {Source identifier: 4187223}
}