Substance use disorders (SUD) have been prominently described on a neuronal level as a chronic and relapsing brain disorder, which is associated with changes in emotion, motivation and cognition. Furthermore on a behavioral level, SUD have been found to be linked to an increased amount of attachment and personality pathology. More in general, SUD treatment has been demonstrated to be a complex phenomenon, with high relapse rates of 30-50% after (successful) treatment.