About: http://webisa.webdatacommons.org/347410616

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	Prior to taking the immunization history, interviewers were blinded to the status of the participants whether cases or controls.
http://www.w3.org/ns/prov#wasQuotedFrom	scielo.org