Artery blockage, blood thickening, heart problems and high blood pressure.
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It sounds like Amanda might have anemia or more specifically Sickle Cell anemia. It reduces the blood's abilities to carry oxygen.
Answer: D
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Answer:
d. Are concerned about non response bias among the controls
Explanation:
Participation incentive is an extrinsic motivator, it is a reward given to encourage participation of people for a certain thing, like a research in this case.
They are particularly useful when the desire to participate in the research for the sake of participating is weak.
From the question, being concerned about no response bias among the group used as control for the research is important because they were not given incentives for them to participate, where as incentives were given to the other group of people (eligible cases)