Placido Effect - Surgery or Surgery?

Surgeons like bruce don't think about these questions very much, because the idea of comparing actual treatment to placiboea ment, isn't builld into the practice of surgery. Bruce and his team decided their study would have not two, but three groups. The first would get the real surgery. The second would have saline washed through the joint. And the third would be a placibo group. Anyone who signed up was informed about the three possible kinds of treatment....