title: Choosing a control group.
authors.affiliation: Department of Biostatistics, Harvard School of Public Health, Boston, Massachusetts.
authors.forename: K
authors.initials: K
authors.lastname: Gauvreau
authors.forename: M
authors.initials: M
authors.lastname: Pagano
mesh_terms: D018849:Controlled Clinical Trials as Topic / Q000379:methods*; D006801:Humans; D018579:Patient Selection; D011897:Random Allocation; D016032:Randomized Controlled Trials as Topic / Q000379:methods*; D015983:Selection Bias