@misc{indiciaee2c6032446ea,
  title = {Separation of opioid peptides utilizing high performance liquid chromatography.},
  author = {R V Lewis and S Stein and S Udenfriend},
  year = {1979},
  doi = {10.1111/j.1399-3011.1979.tb01911.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/38218/},
  note = {Source identifier: 38218}
}