| http://www.w3.org/ns/prov#value | - The sample was drawn from a list that included 71 percent of all doctors registered with the General Medical Council, the governing body for doctors in the U.K.The survey asked doctors if they had ever used a true placebo, like a sugar pill or another kind of dummy treatment such as a drug not meant for the patient's condition or a non-essential examination including blood tests and X-rays.
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