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Social Studies, 27.11.2019 02:31 heatherlemaster
Dr. kiecolt-glaser is a health psychologist studying whether stress impairs the body's ability to heal. in the highly stressful week before final exams, one group of dental students are given an oral punch biopsy—a small sample of gum tissue is removed. the number of days for the oral wound to completely heal is recorded. another group of dental students receive an oral punch biopsy during summer vacation. once again, the number of days until the oral wound completely healed was recorded. the two groups' gum samples were compared. which research method was used?
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