Clinician and service user perceptions of implementing contingency management: a focus group study.

Drug Alcohol Depend · 2011 · PMC3629561 · PMID 21680110

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likely to be significantno p-value reported

However, specific differences between UK and US health and welfare systems mean that there is likely to be significant differences in the cost-effectiveness of CM interventions depending on whether a service user, provider or societal perspective is taken.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.