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An information specialist performed a literature search on key health technology assessment (HTA) resources. The search included all languages and was limited to articles published between January 1, 1990 and October 22, 2010. Regular alerts were current to January 15, 2011. Filters were applied to limit the retrieval to HTAs, systematic reviews, meta-analyses, randomized controlled trials, non-randomized controlled studies, and guidelines. The studies selected were HTAs, systematic reviews, meta-analyses, randomized controlled trials, and non-randomized controlled trials that evaluated the risk of disease transmission to health care workers exposed to aerosol-generating procedures. The outcome of interest was risk of disease transmission. The quality of evidence was rated using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) system.
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