The Journal of Dual Diagnosis: Open Access includes articles and perspectives from four overarching domains relevant to the field: Psychopharmacology & Neurobiology; Psychotherapy & Psychosocial Issues; Services & Policy; and Clinical Forum. Each issue serves to encourage integration of these domains. The Journal seeks to publish articles relevant to a wide range of people interested in dual diagnosis: researchers, physicians, clinicians, trainees, administrators, and policy makers. High-quality empirical research, brief reports, timely reviews, thought-provoking commentaries, and ongoing discussions of clinical issues will be considered for publication, all with the aim of developing a better understanding of the basis of, and optimal treatment for, co-occurring psychiatric and substance use disorders.