SS doctors tested X-rays to see the efficacy as a sterilization device by administering large doses to female prisoners. Josef Mengele, was the most infamous doctor at Auschwitz also known as the "Angel of Death" was interested on researching identical twins. He performed crule experiments on twins by inducing diseases in one twin and killing the other when the first one died to compare the autopsies. Mengele deliberately induced Noma in dwarfs, twins and other prisoners to study the effects. Prisoners were very independent. Some prisoners didn't want to do anything they were supposed to do. Prisoners who didn't work would get whipped or shot. They often would steal from others or get extra portions of food. Those would find themselves getting hung or extra work. Others who tried to escape would get immediate death. Diseases were all over the camps, such as disease carrying lice, typhus, malnutrition and Noma, the most common for the death of children. "Because of indifference, one dies before one actually dies." -Elie