[How to avoid opioid tolerance].

@article{Brinkschmidt2011HowTA,
  title={[How to avoid opioid tolerance].},
  author={T. Brinkschmidt and Sonia T Neumeier},
  journal={MMW Fortschritte der Medizin},
  year={2011},
  volume={153 36},
  pages={46-8}
}