Efficacy of a web-based self-help tool to reduce problem gambling in Switzerland: study protocol of a two-armed randomised controlled trial.
Christian BaumgartnerElena BileviciusYasser KhazaalSophia AchabSusanne SchaafAndreas WengerSeverin HaugMatthew KeoughDavid HodginsMichael Patrick SchaubPublished in: BMJ open (2019)
Current Controlled Trials registry (ISRCTN16339434).