Modulation of the analgesic efficacy and potency of morphine by [D-Pen2, D-Pen5]enkephalin in mice.

@article{Jiang1990ModulationOT,
  title={Modulation of the analgesic efficacy and potency of morphine by [D-Pen2, D-Pen5]enkephalin in mice.},
  author={Qi Jiang and Henry I. Mosberg and F rank Porreca},
  journal={Progress in clinical and biological research},
  year={1990},
  volume={328},
  pages={449-52}
}