About: http://webisa.webdatacommons.org/452602194

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	There were some limitations, such as small number of studies included, but this was limited by availability of adequate studies and publication bias concerning this topic.
http://www.w3.org/ns/prov#wasQuotedFrom	nel.gov