The placebo effect usually occurs in about half of control group members.
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Q4: It is possible for a disease to
Q5: For chronic diseases that are not lethal,
Q6: Case-control studies are much more efficient than
Q7: Prospective and retrospective studies both look for
Q8: In a clinical trial of a new
Q10: An important case-control study conducted in the
Q11: A _ of 1.0 means that there
Q12: In a _ trial, subjects are assigned
Q13: In a _ trial, neither physician nor
Q14: whats the terms to the appropriate description.
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