title: Clinical trials: introduction.
authors.affiliation: Section of Preventive Cardiology, The Cardiovascular Institute, Göteborg University, Göteborg, Sweden.
authors.forename: P
authors.initials: P
authors.lastname: Held
authors.forename: H
authors.initials: H
authors.lastname: Wedel
authors.forename: L
authors.initials: L
authors.lastname: Wilhelmsen
mesh_terms: D002986:Clinical Trials as Topic; D019317:Evidence-Based Medicine; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D012106:Research