@misc{9737,
  author = {R. Cornish and J. Macleod and J. Strang and P. Vickerman and M. Hickman},
  title = {Risk of death during and after opiate substitution treatment in primary care: prospective observational study in UK General Practice Research Database},
  year = {2010},
  journal = {Bmj},
  volume = {341},
  pages = {c5475},
  issn = {0959-8138},
  doi = {10.1136/bmj.c5475},
}