title: [Is it always necessary to use the double-blind method in controlled clinical trials?].
authors: J
authors: J
authors: Soto
mesh_terms: D018849:Controlled Clinical Trials as Topic / Q000379:methods*; D004311:Double-Blind Method; D006801:Humans
vernacular_title: Es necesario utilizar siempre la técnica del doble ciego en los ensayos clínicos controlados?