<http://webisa.webdatacommons.org/prov/442366958> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/292498258> . <http://webisa.webdatacommons.org/292498258> <http://www.w3.org/ns/prov#value> "veloped in the 1970s.1 It is universally recommended in several countries, including the United States, Canada, Australia and Finland." . <http://webisa.webdatacommons.org/292498258> <http://www.w3.org/ns/prov#wasQuotedFrom> <pubmedcentralcanada.ca> . <http://webisa.webdatacommons.org/292498258> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/prov/441920916> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/292498258> .