This not correct I believe. Although most do not know this they did live experiments on Jewish during WW2. Transplanting organize was actually found to be successful done first here. This was just a thing of bad press for anyone in reality.
Think about it if you have a lot of people your killing anyways and you can take their body parts for solders what do you think they did?
So it was about 1948 that the war concluded although some trials took longer so to speak. So then it is amazing how this technology just seem to happen right after the war?
I am about 99% positive or this from odd journals I read here and there in the back of libraries so to speak and enough reading between the lines of things.
Note this can only be speculation but I would be willing to bet in this.