This was done in order for the doctors to be sure that they have the best subject for the experiment. The doctors will have a basis for comparison in order to measure the effects of the procedure after it is done.
<em>Hope this helped! :)</em>
According to the doctrine of separation of powers, the U.S. Constitution distributed the power of the federal government among these three branches, and built a system of checks and balances to ensure that no one branch could become too powerful.