Chronic non-cancer pain and opioid dependence.

@article{Littlejohn2004ChronicNP,
  title={Chronic non-cancer pain and opioid dependence.},
  author={Christopher Littlejohn and A. Baldacchino and Jonathan Bannister},
  journal={Journal of the Royal Society of Medicine},
  year={2004},
  volume={97 2},
  pages={62-5}
}