A Web-Based Self-Help Intervention With and Without Chat Counseling to Reduce Cannabis Use in Problematic Cannabis Users: Three-Arm Randomized Controlled Trial.

Michael Patrick Schaub Andreas Wenger Oliver Berg Thilo Beck Lars Stark Eveline Buehler Severin Haug

Published in: Journal of medical Internet research (2015)

International Standard Randomized Controlled Trial Number (ISRCTN): 59948178; http://www.isrctn.com/ISRCTN59948178 (Archived by WebCite at http://www.webcitation.org/6bt01gfIr).

Keyphrases

randomized controlled trial
study protocol
smoking cessation
clinical trial
meta analyses