@prefix n9j: <http://data.loterre.fr/ark:/67375/N9J> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix isothes: <http://purl.org/iso25964/skos-thes#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .

n9j:-RFH9RZ0N-9
  skos:prefLabel "epidemiologic data"@en ;
  a skos:Concept ;
  skos:narrower n9j:-T9W6L8V6-6 .

n9j:-concepts
  a isothes:ConceptGroup ;
  skos:prefLabel "concepts"@en ;
  skos:member n9j:-T9W6L8V6-6 .

n9j: a skos:ConceptScheme .
n9j:-T9W6L8V6-6
  owl:sameAs <https://concepts.sagepub.com/social-science/concept/physicians'_health_study> ;
  skos:definition "The Physicians' Health Study (PHS) is a randomized, double-blind, placebo-controlled trial that was initially designed as a cohort study to test the effect of two medications: (1) the effect of aspirin on mortality due to cardiovascular disease and (2) the effect of beta-carotene on reducing the incidence of cancer. The initial planning for the PHS began in 1978, with Phase One (PHS-I) beginning in 1982 and ending in 1995. [Source: Encyclopedia of Epidemiology; Physicians' Health Study]"@en ;
  a skos:Concept ;
  skos:inScheme n9j: ;
  skos:broader n9j:-RFH9RZ0N-9 ;
  skos:prefLabel "physicians' health study"@en .