You mention a study where 12 volunteers were subjected to E.

You mention a study where 12 volunteers were subjected to E. Coli & didn’t get sick; how was the control set up for this experiment? Was there another 12-volunteer control group that developed food poisoning? Was one group given biofeedback training? If you just hook EKGs up to people and watch them not get food poisoning, I’m not sure how that constitutes any kind of scientific study — with such a small group, maybe they all had strong stomachs by chance!