Complex sentence: However, Abrams was never able to demonstrate that his devices were effective; no radionic device has been found effective in the diagnosis or treatment of any disease, and the United States Food and Drug Administration does not recognize any legitimate medical uses for such devices.
Split into simpler sentences: However, Abrams was never able to demonstrate that his devices were effective. No radionic device has been found effective in the diagnosis or treatment of any disease, and the United States Food and Drug Administration does not recognize any legitimate medical uses for such devices.