Question: True/False: A unplanned crossover happens when subjects are randomized to new treatment or current treatment after being observed for a certain period of time on

True/False: A unplanned crossover happens when subjects are randomized to new treatment or current treatment after being observed for a certain period of time on one therapy and after any changes are measured . the patients are switched to the other therapy. Both groups are then again observed for a certain period of time

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