{"footnote":"  \u003Cp\u003E    A trial is any study of a new treatment or screening test; a controlled trial is one in which the outcomes for patients undergoing the new intervention are compared with those for a suitable    control group; and in a randomised controlled trial, participants are randomly assigned to the two groups, which ensures that any difference in outcome between the two groups must be the result    of the intervention.  \u003C\/p\u003E\n","audio":[],"video":[]}