About: http://webisa.webdatacommons.org/319064943

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	systematic error such as bias and confounding may influence study findings to a much greater extent than random error (Rothman 1990; Savitz and Olshan 1995; Savitz and Olshan 1998; Thompson 1998).
http://www.w3.org/ns/prov#wasQuotedFrom	pubmedcentralcanada.ca