Research
Influence of opioid prescribing standards on drug use among patients with long-term opioid use: a longitudinal cohort study
Richard L. Morrow, Ken Bassett, James M. Wright, Greg Carney and Colin R. Dormuth
July 25, 2019 7 (3) E484-E491; DOI: https://doi.org/10.9778/cmajo.20190003