Charging for the use of survey instruments on population health: the case of quality-adjusted life years.

Bull World Health Organ · 2020 · PMC6933437 · PMID 31902963

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a worrying trendno p-value reported

2 A worrying trend is organizations charging for access to research tools and databases that are vital to research supporting national and international policy development.

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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.