• Komorbidität von Trauma/PTBS und Sucht,
• Behandlungsmodelle,
• Psychotherapieforschung,
• Flucht/Migration und Sucht

• Raj N, Verthein U, Grundmann J, Lotzin A, Hiller P, Schulte B, Driessen M, Hillemacher T, Scherbaum N, Schäfer M, Schneider B, Schäfer I (2021) Internalizing and externalizing subtypes in female patients with co-occurring post-traumatic stress disorder and substance use disorders. J Subst Abuse Treat;121:108198. doi: 10.1016/j.jsat.2020.108198. 
• Kahl J, Holl J, Grundmann J, Lotzin A, Hiller P, Schroeder K, Schulte B, Barnow S, Schäfer I (2020)  Difficulties in emotion regulation as an underlying mechanism for the development and maintenance of PTSD in female patients with substance use disorders. Substance Use & Misuse, 55:13, 2184-2193, DOI: 10.1080/10826084.2020.1797805
• Grundmann J, Lotzin A, Sehner S, Verthein U, Hiller P, Hiersemann R, Lincoln TM, Hillemacher T, Schneider B, Driessen M, Scherbaum N, Dotten AC, Schäfer I (2020) Predictors of attendance in outpatient group treatment for women with posttraumatic stress disorder and substance use disorder. Psychother Res. 15:1-12. doi: 10.1080/10503307.2020.1817604
• Melchior H, Hüsing P, Grundmann J, Lotzin A, Hiller P, Pan Y, Driessen M, Scherbaum N, Schneider B, Hillemacher T, Stolzenburg S, Schomerus G, Schäfer I; Cansas Study Group (2019) Substance Abuse-Related Self-Stigma in Women with Substance Use Disorder and Comorbid Posttraumatic Stress Disorder. Eur Addict Res; 25:20-29
• Gidzgier P, Grundmann J, Lotzin A, Hiller P, Schneider B, Driessen M, Schäfer M, Scherbaum N, Hillemacher T, Schäfer I (2019) The dissociative subtype of PTSD in women with substance use disorders: Exploring symptom and exposure profiles. Journal of Substance Abuse Treatment. Journal of Substance Abuse Treatment; 99: 73-79 DOI: 10.1016/j.jsat.2019.01.004
• Lotzin A, Grundmann J, Hiller P, Pawils S, Barnow S, Schäfer I (2019) Profiles of Childhood Trauma in Women with Substance Use Disorder and Comorbid Posttraumatic Stress Disorder. Frontiers in Psychiatry, 10, 674; doi: 10.3389/fpsyt.2019.00674
• Schäfer I, Lotzin A, Hiller P, Sehner S, Driessen M, Hillemacher T, Schäfer M, Scherbaum N, Schneider B & Grundmann J (2019) A multisite randomized controlled trial of Seeking Safety vs. Relapse Prevention Training for women with co-occurring posttraumatic stress disorder and substance use disorders. European Journal of Psychotraumatology; 10:1577092
• Grundmann J, Lincoln T, Lüdecke D, Bong S, Schulte B, Verthein U & Schäfer I (2018) Traumatic Experiences, Revictimization and Posttraumatic Stress Disorder in German Inpatients Treated for Alcohol Dependence. Substance Use & Misuse, 53: 677-685
• Kaiser D, Grundmann J, Schulze C, Stubenvoll M, Kosar M, Junker M, Najavits LM & Schäfer I (2015) A Pilot Study of Seeking Safety in a Sample of German Women Outpatients with Substance Dependence and Posttraumatic Stress Disorder. Journal of Psychoactive Drugs; 47(5): 401-408
• Grundmann J, Schäfer I. Posttraumatische Belastungsstörung und komorbide Suchterkrankungen. In Walter M, Gouzoulis-Mayfrank E (Hrsg.): Psychische Störungen und Suchterkrankungen - Diagnostik und Behandlung von Doppeldiagnosen. Stuttgart: Kohlhammer (2013).

Projekte

• PREPARE – Prävention und Behandlung von Suchtproblemen bei Geflüchteten