The Role of Military Strategies in Medical Thinking
Hartman, Adam L.
PERSPECTIVES IN BIOLOGY & MEDICINE 1993 Winter; 36(2): 177- 183
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Recruiting Patients to Medical Research: Double Blind Randomised Trial of "Opt-In" Versus "Opt-Out" Strategies Junghans, Cornelia; Feder, Gene; Hemingway, Harry; Timmis, Adam; Jones, Melvyn (2005-10-22)OBJECTIVE: To evaluate the effect of opt-in compared with opt- out recruitment strategies on response rate and selection bias. DESIGN: Double blind randomised controlled trial. SETTING: Two general practices in England. ...