I do not challenge what you have said. I am aware of some strange things that happened in connection with Whitecoat.
However, officially:
* Participation was limited to Seventh-day Adventists who were formally Conscientious Objectors, and who went through Basic Training at Ft. Sam Houston, Texas, and requested assignment to Whitecoat.
* After assignment to Whitecoat, one had to volunteer for a specific experiment.