Simplify the following text for a Grade 13 native English-speaking person.
Original: The medical experiments conducted by German doctors and prosecuted in the so-called Doctors ' Trial led to the creation of the Nuremberg Code to control future trials involving human subjects , a set of research ethics principles for human experimentation .
Simplified: The medical experiments conducted by German doctors and prosecuted in the so-called Doctors ' Trial led to the creation of the Nuremberg Code to control future trials involving human subjects .