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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	, Controlled Trials,??? New England Journal of Medicine 342:1878???1886, 2000) For the remainder of this section, and in Sections 1.3 through 1.5, we will look at obtaining data through various types of observational studies.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com