@misc{indiciae8963f62f81cf,
  title = {Decrease of tolerance development to morphine by 5-hydroxytryptophan and some related drugs.},
  author = {E Contreras and L Tamayo and L Quijada and E Silva},
  year = {1973},
  doi = {10.1016/0014-2999(73)90035-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/4270007/},
  note = {Source identifier: 4270007}
}