Patients who agree to participate in the study will be randomly assigned to one of two second-level treatment conditions: the VR-CET group will receive cue-exposure sessions using VR environments (six 60-minute (maximum) sessions over the course of three weeks; two per week) and the A-CBT group will receive six additional sessions of the usual cognitive behavioral treatment. Consistent with the American Psychological Association and the CONSORT guideline recommendations regarding sample size in this type of research, 30 patients will be included in each group. If necessary, dropout cases will be replaced.