About: http://webisa.webdatacommons.org/325099732

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	However, the effectiveness and safety of CAS were not fully evaluated, mainly because of methodological difficulties in finding an appropriate comparison group.
http://www.w3.org/ns/prov#wasQuotedFrom	biomedsearch.com