title: In response to: Grunkemeier GL, Starr A. Alternatives to randomization in surgical studies.
authors.forename: M
authors.initials: M
authors.lastname: Turina
mesh_terms: D004992:Ethics, Medical; D005060:Europe; D006350:Heart Valve Prosthesis; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D014481:United States; D014486:United States Food and Drug Administration