@misc{8281,
  author = {T. Chen and L. Chen and R. Knaggs},
  title = {A 15-year overview of increasing tramadol utilisation and associated mortality and the impact of tramadol classification in the United Kingdom},
  year = {2018},
  journal = {Pharmacoepidemiol Drug Saf},
  volume = {27},
  number = {5},
  pages = {487-494},
  issn = {1053-8569},
  doi = {10.1002/pds.4320},
}