About: http://webisa.webdatacommons.org/393775678

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	1: study is a properly randomized controlled trial, or an observational study with a clear predefined inception cohort (that attempted to evaluate all patients in the inception cohort)
http://www.w3.org/ns/prov#wasQuotedFrom	ahrq.gov