About: http://webisa.webdatacommons.org/18602163

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	estimates may be biased because of refusals and other forms of non-response.
http://www.w3.org/ns/prov#wasQuotedFrom	biomedcentral.com