The origins of the CAFL was with John Crane when he was working with R. Rife back in the 1950's.
The most important point that I would submit is that of those who have used the CAFL, there are very few complaints of it not working. As with anything, nothing man-made is perfect.
If the CAFL is unproven, it is because of FDA suppression. They have gone so far out of their way to suppress this technology that they have intentionally sought to destroy and have actually destroyed valuable historical artifacts.