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The VHL is a collaborative product coordinated by BIREME/PAHO/WHO. As a library, the VHL provides comprehensive access to scientific literature in health. The VHL is not a publisher, but rather collects, indexes, and archives citations of literature published by other organizations. The inclusion of any article, document, or citation in the VHL collection does not imply endorsement or agreement by BIREME/PAHO/WHO with their content.