About: http://webisa.webdatacommons.org/133034538

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	To obtain information for this report, we systematically searched 23 electronic databases, including PubMed?? and EMBASE. In general, literature searches covered the years 1985 to January 1, 2002.
http://www.w3.org/ns/prov#wasQuotedFrom	ahrq.gov