AUTHOR=Toll Lawrence , Standifer Kelly M. , Massotte Dominique TITLE=Editorial: Current Topics in Opioid Research JOURNAL=Frontiers in Psychiatry VOLUME=10 YEAR=2019 URL=https://www.frontiersin.org/journals/psychiatry/articles/10.3389/fpsyt.2019.00586 DOI=10.3389/fpsyt.2019.00586 ISSN=1664-0640