Some of the questions outlined above are currently addressed by the research network ‘CANSAS’, 1 which is funded by the German Ministry for Education and Research. In a multi-disciplinary approach, the CANSAS network brings together experts in the fields of trauma treatment for patients with SUD, epidemiology and risk factor research, biological and psychological moderators, as well as health services research. The aims of the network are (1) to gain a better understanding of the relationships between the two important public health problems CAN and SUD; (2) to promote evidence-based treatments for survivors of CAN with SUD; and (3) to provide services with trainings to improve the assessment of CAN among clients with SUD and to assess risk factors for the perpetration of CAN in this population. The following sections give an overview of the six different projects of the CANSAS network.