AUTHOR=Ghitza Udi E. , Gore-Langton Robert E. , Lindblad Robert , Tai Betty TITLE=NIDA Clinical Trials Network Common Data Elements Initiative: Advancing Big-Data Addictive-Disorders Research JOURNAL=Frontiers in Psychiatry VOLUME=6 YEAR=2015 URL=https://www.frontiersin.org/journals/psychiatry/articles/10.3389/fpsyt.2015.00033 DOI=10.3389/fpsyt.2015.00033 ISSN=1664-0640