title: [Clinical trials in primary care].
authors.affiliation: Servicio de Pediatría, Complejo Asistencial de Palencia, Palencia, España.
authors.forename: José María
authors.initials: JM
authors.lastname: Andrés de Llano
mesh_terms: D006801:Humans; D011320:Primary Health Care; D016032:Randomized Controlled Trials as Topic / Q000331:legislation & jurisprudence; D013030:Spain