Published on in Vol 20, No 5 (2018): May

Preprints (earlier versions) of this paper are available at https://preprints.jmir.org/preprint/9579, first published .
Effects of Treatment Length and Chat-Based Counseling in a Web-Based Intervention for Cannabis Users: Randomized Factorial Trial

Effects of Treatment Length and Chat-Based Counseling in a Web-Based Intervention for Cannabis Users: Randomized Factorial Trial

Effects of Treatment Length and Chat-Based Counseling in a Web-Based Intervention for Cannabis Users: Randomized Factorial Trial

Benjamin Jonas 1, Dipl-Psych;  Marc-Dennan Tensil 1, Dipl-Psych;  Peter Tossmann 1, PhD, Dipl-Psych;  Evelin Strüber 2, Dipl-Soz

1 Delphi Gesellschaft für Forschung, Beratung und Projektentwicklung , Berlin , DE

2 Federal Centre for Health Education , Cologne , DE

Corresponding Author:

  • Benjamin Jonas, Dipl-Psych
  • Delphi Gesellschaft für Forschung, Beratung und Projektentwicklung
  • Kaiserdamm 8
  • Berlin
  • DE
  • Phone: 49 30 39 40 97 82
  • Email: jonas@delphi.de