title: [Why are so few clinical trials run in primary care?].
authors.affiliation: Unidad de Investigaci n de Atenci n Primaria, Servicio Vasco de Salud, Vizcaya.
authors.forename: G
authors.initials: G
authors.lastname: Grandes
mesh_terms: D002986:Clinical Trials as Topic / Q000379:methods / Q000706:statistics & numerical data*; D006801:Humans; D011320:Primary Health Care / Q000706:statistics & numerical data*