Access the US Health Information Knowledgebase US Health Information Knowledgebase Continue to the US Health Information Knowledgebase site Current as of March 2013 Internet Citation: Access the US Health Information Knowledgebase. March 2013. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/redirects/Third-levelDomainRedirects/USHIK-Redirect.html