@article{null,
  title={Opioid Drug Addiction and Pain: Diagnostic and Management Challenges},
  author={barry j. sessle},
  journal={Journal of Oral & Facial Pain and Headache},
  volume={28},
  number={3},
  pages={189--189},
  doi = {10.11607/ofph.2014.3.e},
  year={2014}
}