Project Title: Improving Buprenorphine Retention with Transcutaneous Auricular Neurostimulation for Patients with Co-occuring Posttraumatic Stress Disorder and Opioid Use Disorder, Investigators: Sprunger, J., Welge, J., Winhusen, T., Funding Agency: National Institute on Drug Abuse, Funding Amount: 582,205, Grant Level: Federal, Duration: 09-01-2023 -08-31-2024