Its well known. But not for FFS. For the most part i believe that is nonsense. Instead it was SOP. Like doing blodletting on a sick patient. You did it becaus

Its well known. But not for FFS. For the most part i believe that is nonsense. Instead it was SOP. Like doing blodletting on a sick patient. You did it because it qas the thing to do. In 1970s it was hip replacement 1980s it was tonsil removal Etc