@misc{9422,
  author = {M. Frisher and O.I. Martino and J. Bashford and I. Crome and P. Croft},
  title = {Incidence of psychoses among drug dependent patients in primary care with no psychiatric history: a retrospective observational matched-cohort study},
  year = {2013},
  journal = {The European Journal of Psychiatry},
  volume = {27},
  pages = {240-7},
}