AUTHOR=Sjoerds Zsuzsika , Luigjes Judy , Van Den Brink Wim , Denys Damiaan , YĆ¼cel Murat TITLE=The Role of Habits and Motivation in Human Drug Addiction: A Reflection JOURNAL=Frontiers in Psychiatry VOLUME=5 YEAR=2014 URL=https://www.frontiersin.org/journals/psychiatry/articles/10.3389/fpsyt.2014.00008 DOI=10.3389/fpsyt.2014.00008 ISSN=1664-0640