About: http://webisa.webdatacommons.org/375996368

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	Thus, the trial had a 2 x 2 placebo controlled design, with practitioners and patients blind to whether placebo or control was being administered.
http://www.w3.org/ns/prov#wasQuotedFrom	plos.org