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Although not strictly illegal, the U.S. Justice Department frowns on reciprocity because the practice
Epidemiologic Study
Research conducted to study the distribution and determinants of health-related states or events in specific populations, and to apply this study to control health problems.
Randomized Trial
A study design that randomly assigns participants into an experimental group or a control group to measure the effect of a variable.
Placebo Group
A group of participants in a clinical trial that receives a sham treatment to compare the actual treatment's effectiveness against no treatment.
Control Group
A group in a study or experiment that does not receive the experimental treatment and is used as a benchmark to gauge the effects of the intervention.
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