About: http://webisa.webdatacommons.org/404089139

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	Vickers points out that ???missing data is a big problem in medical research.??? Imputing the value of the missing data, as might be imagined, is tricky and fraught with difficulties.
http://www.w3.org/ns/prov#wasQuotedFrom	causeweb.org