@misc{indiciaec1319a0a2938,
  title = {Novel high-performance liquid chromatographic and solid-phase extraction methods for quantitating methadone and its metabolite in spiked human urine.},
  author = {Y F Cheng and U D Neue and L L Woods},
  year = {1999},
  doi = {10.1016/s0378-4347(99)00116-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/10410924/},
  note = {Source identifier: 10410924}
}