Corrigendum to “Changes in opioid prescribing after implementation of mandatory registration and proactive reports within California's prescription drug monitoring program” [Drug Alcohol Depend. 218 (2021) 108405] (Drug and Alcohol Dependence (2021) 218, (S0376871620305706), (10.1016/j.drugalcdep.2020.108405))

The authors regret that in the published article two important acknowledgements were inadvertently omitted. The corrected acknowledgements section in full can be found below, and now includes the additional acknowledgements in the second paragraph. Acknowledgments We thank Dr. Peter Kreiner and Gail Strickler from Brandeis University for providing access and helping with the Prescription Behavioral Surveillance System data. We are grateful to the staff of Florida's prescription drug monitoring program for providing prescribing data and responding to all our inquiries. We also acknowledge the support of the Bureau of Justice Assistance through the grant No. 2017-PM-BX-K038. The authors would like to apologise for any inconvenience caused.