Not all placebos are created equal

The placebo effects of different therapies are not identical, and patients who respond to one type of placebo may not respond to others, according to research from the USA. In a crossover study, researchers tested the analgesic effects of four treatments on pain sensitivity in 48 healthy volunteers. The four treatments were placebo pills, sham acupuncture, verum electro-acupuncture and a no-treatm ...
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