 This new larger part of project follows work we have conducted in a NIDA-funded pilot project over the past four years, developing the complementary intervention. In our preliminary studies Phase I ab, we conducted focus groups, an open trial, and a small randomized controlled trial n 53 to demonstrate the promise of the novel intervention. The pilot phase I ab portion enrolled 171 subjects signed consent at Duke. 19 of 53 completed the treatment portion. During Phase 1a, the VR and CER technology was developed and refined using two small open clinical trials. At the conclusion of Phase 1a, a treatment manual detailing the rationale and parameters of VR and CER technology was completed. Next, as mentioned, a Phase Ib pilot randomized clinical trial was conducted in order to determine the acceptability and feasibility of this treatment to patients and therapists, and to obtain treatment outcome effect size estimates. 