@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_cancer_	skos:broader	isac:case-control_study_ .
isac:_man_	skos:broader	isac:case-control_study_ .
isac:_method_	skos:broader	isac:case-control_study_ .
isac:_study_	skos:broader	isac:case-control_study_ .
isac:_woman_	skos:broader	isac:case-control_study_ .
isac:_population_	skos:broader	isac:case-control_study_ .
isac:_fact_	skos:broader	isac:case-control_study_ .
isac:_material_	skos:broader	isac:case-control_study_ .
isac:study_design_	skos:broader	isac:case-control_study_ .
isac:_basically_	skos:broader	isac:case-control_study_ .
<http://webisa.webdatacommons.org/concept/nested+case-control_study_>	skos:broader	isac:case-control_study_ .