About: http://webisa.webdatacommons.org/122014229

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	In a case-control study, subjects with the disease of interest are identified, and controls are selected, usually matched to cases on the basis of age, gender, and other factors.
http://www.w3.org/ns/prov#wasQuotedFrom	nap.edu