CANreduce 2.0 Adherence-Focused Guidance for Internet Self-Help Among Cannabis Users: Three-Arm Randomized Controlled Trial

Christian Baumgartner   ¹ , MSc ;   Michael Patrick Schaub   ¹ , PhD ;   Andreas Wenger   ¹ , MSc ;   Doris Malischnig   ² , PhD ;   Mareike Augsburger   ¹ , PhD ;   Marc Walter   ³ , MD ;   Thomas Berger   ⁴ , PhD ;   Lars Stark   ⁵ , MD ;   David Daniel Ebert   ⁶ , PhD ;   Matthew T Keough   ⁷ , PhD ;   Severin Haug   ¹ , PhD

¹ Swiss Research Institute for Public Health and Addiciton, University of Zurich, Zürich, Switzerland

² Institute for Addiction Prevention, Addiction and Drug Coordination Vienna, Vienna, Austria

³ University Psychiatric Clinics, University of Basel, Basel, Switzerland

⁴ Department of Clinical Psychology and Psychotherapy, University of Bern, Bern, Switzerland

⁵ Arud Centre for Addiction Medicine, Zurich, Switzerland

⁶ Department for Sport and Health Sciences, Chair for Psychology and Digital Mental Health Care, Technical University Munich, Munich, Germany

⁷ Department of Psychology, York University, Toronto, ON, Canada