@misc{9228,
  author = {C. Zin and L. Chen and R. Knaggs},
  title = {Changes in trends and pattern of strong opioid prescribing in primary care},
  year = {2014},
  journal = {Eur J Pain},
  volume = {18},
  number = {9},
  pages = {1343-51},
  issn = {1090-3801},
  doi = {10.1002/j.1532-2149.2014.496.x},
}