<http://webisa.webdatacommons.org/prov/194585485>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/389429014> .
<http://webisa.webdatacommons.org/389429014>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<york.ac.uk> .
<http://webisa.webdatacommons.org/389429014>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/389429014>	<http://www.w3.org/ns/prov#value>	"Several relevant sources were searched and attempts were made to minimise publication bias by including studies reported only as abstracts." .