<http://webisa.webdatacommons.org/32125053>	<http://www.w3.org/ns/prov#value>	"We risk-adjusted the data by propensity-matching the open and MIS cases based on patient characteristics including comorbidities, hospital characteristics, procedural characteristics, payer, and surgeon specialty." .
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<http://webisa.webdatacommons.org/prov/516193666>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/32125053> .
<http://webisa.webdatacommons.org/32125053>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<managedcaremag.com> .