About: http://webisa.webdatacommons.org/438916867

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	Difficulties are not only encountered with extrapolation from animal models to humans, but epidemiological studies are also thwarted by drawbacks such as controlling for confounding factors.
http://www.w3.org/ns/prov#wasQuotedFrom	pubmedcentralcanada.ca