@misc{indiciae6020cfe534e7,
  title = {Opioid metabolites.},
  author = {Jörn Lötsch},
  year = {2005},
  doi = {10.1016/j.jpainsymman.2005.01.004},
  url = {https://pubmed.ncbi.nlm.nih.gov/15907643/},
  note = {Source identifier: 15907643}
}