Customers/gamblers gambling at Norsk Rikstoto (gambling monopolist in Norway providing horse gambling products with potential gambling problems will be randomly allocated to receive a proactive phone call (encouraging them to change their gambling behavior - e.g., be lowering the loss limit) or to a control condition. Outcomes will be short and long terms registered gambling behavior.
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Theoretical loss
Timeframe: Change from baseline (30 days before the call) to day 1-90 after the call (short-term effect) and change from baseline (30 days before the call) to day 91-180 after the call (long-term effect).