About: http://webisa.webdatacommons.org/405715659

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	Therefore, the investigators use the same age (or age range), gender, race, and other characteristics to select cases and controls.
http://www.w3.org/ns/prov#wasQuotedFrom	nih.gov