1. There is a study that can be used as an example to illustrate the role doctors play in making placebos work. <br>2. It has been found that placebo can play a role in many different cases. <br>3. There was an experiment to test whether placebo can help the elderly to live a long and healthy life. <br>4. If the patient thinks that taking medicine will cause adverse reactions, then placebo can cause undesirable consequences. <br>5. Some people vow to think that you can use spirit to cure your illness.
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