@misc{indiciaef1687c69fc8c,
  title = {Does prolonged oral treatment with sustained-release morphine tablets influence immune function?},
  author = {S Palm and S Lehzen and C Mignat and J Steinmann and G Leimenstoll and C Maier},
  year = {1998},
  doi = {10.1097/00000539-199801000-00033},
  url = {https://pubmed.ncbi.nlm.nih.gov/9428873/},
  note = {Source identifier: 9428873}
}