title: "Improvement" in the placebo group could be due to regression to the mean as well as to sociobiologic factors.
authors.forename: Andreas
authors.initials: A
authors.lastname: Rück
authors.forename: Christer
authors.initials: C
authors.lastname: Sylvén
mesh_terms: D002986:Clinical Trials as Topic; D003327:Coronary Disease / Q000628:therapy*; D003627:Data Interpretation, Statistical; D006801:Humans; D015990:Placebo Effect