<http://webisa.webdatacommons.org/prov/330699736>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/242504928> .
<http://webisa.webdatacommons.org/242504928>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<hindawi.com> .
<http://webisa.webdatacommons.org/242504928>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/242504928>	<http://www.w3.org/ns/prov#value>	"In addition, since data other than income, age, and sex were not obtained, there may have been confounding factors that we were unable to adjust for." .
<http://webisa.webdatacommons.org/prov/466517259>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/242504928> .